Article
Engineering, Electrical & Electronic
Fatima Sofrani, Keltouma Boudia, Abderrahmane Cheriet, Akram Alhussiene, Linda Aissani
Summary: Using density functional theory (DFT), the properties of VMSb (M = Pd, Pt) half-Heusler compounds were studied, including structural parameters, electronic properties, magnetic properties, and elastic properties. The calculations were performed using the FP-LAPW method with the WC-GGA approximation. The results showed that VMSb (M = Pd, Pt) compounds exhibit half-metallic ferromagnetism and have potential applications in spintronic devices.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
M. Y. Raia, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, A. Hourmatallah, N. Benzakour, K. Bouslykhane
Summary: This study investigates the structural, magnetic, electronic, thermodynamic, optical, and thermoelectric properties of Heusler alloy Co2Fe1-xTixGa using the full potential linearized augmented plane-wave method within density functional theory. The influence of transition metal element doping on lattice constant, bulk modulus, and band gap for quaternary alloys is found to have a linear dependence on alloy composition with a small deviation. The calculated results are in good agreement with experimental data, and the equilibrium L2(1) structure shows that all concentrations are half-metallic using the GGA + U scheme. Moreover, the study also explores the thermodynamic effects of pressure and temperature, as well as the optical parameters and thermoelectric properties of Co2Fe1-xTixGa in the temperature range of 300-900 K.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Mohammed S. Abu-Jafar, Vincent Leonhardi, Raed Jaradat, Ahmad A. Mousa, Samah Al-Qaisi, Nada T. Mahmoud, Ahmed Bassalat, R. Khenata, A. Bouhemadou
Summary: This study investigates the properties of Scandium Carbide compound using first-principles calculations, revealing that NaCl and NiAs structures are mechanically and dynamically stable phases, while ZB and CsCl structures are unstable. The electronic structures of all considered structures show metallic character.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Benaissa Nour-eddine, F. Belkharroubi, I. Ameri, L. F. Blaha, Benaissa Abdelghani, Drici Lamia, M. Bourdim, A. Tebboune, M. N. Belkaid, M. Ameri, B. Fassi, S. Driz, Y. Al-Douri, A. F. Abd El-Rehim, A. Bouhemadou
Summary: First-principles calculations have been conducted to investigate the structural, elastic, electronic, and magnetic properties of full-Heusler alloys Ir2HfB, Ir2HfAl, and Ir2HfGa. The results show that these alloys have stable cubic AlCu2Mn-type structures in a ferromagnetic state and exhibit metallic behavior. Additionally, the consideration of strong electronic correlation improves the band gap width, resulting in half-metallic behavior for Ir2HfAl and Ir2HfGa alloys and near half-metallic behavior for Ir2HfB.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
D. Parajuli, K. Ramanjaneyulu, N. Murali, A. Ramakrishna, Khalid Mujasam Batoo, K. Samatha, V. Veeraiah
Summary: In this study, the DFT-FP-LAPW method was used to investigate the properties of BiMO3 (M = Al, Ga, and In). The structural, electronic, and optical properties were analyzed through energy band structure, density of states, and charge density calculations. The results showed that there is ionic bonding between Bi-O and a mixture of ionic and strong covalent bonds between M (Al, Ga, In)-O. These materials exhibit potential for applications in various devices such as memories, capacitors, and sensors.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Pablo G. Gonzales-Ormeno, Miguel A. Mendoza, Claudio G. Schon
Summary: The properties of GaAs（1-x）Mx compounds were discussed using computational methods. It was found that increasing the metallic concentration leads to enhanced optical properties, but also increases the presence of metallic characteristics. GaFe compound behaves as an indirect degenerate semiconductor. The addition of Fe and Cu decreases the stability of the compound.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
M. Y. Raia, R. Masrour, A. Jabar, A. Rezzouk, M. Hamedoun, A. Hourmatallah, N. Benzakour, K. Bouslykhane, J. Kharbach
Summary: In this study, the structural, electronic, magnetic, thermoelectric, optical, elastic, and thermal properties of Co2Mn1-xTixGe were investigated using the first-principles method. The compounds were found to be perfect half-metallic ferromagnets, and the mechanical stability was influenced by the composition.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
D. Oudrane, I Bourachid, H. Bouafia, B. Djebour, B. Sahli, B. Abidri, D. Rached
Summary: In this study, the structural, elastic, electronic, and optical properties of EuTiO3 perovskite were investigated using ab initio density functional calculations. It was found that EuTiO3 adopts an antiferromagnetic state and exhibits mechanical stability and ductility in its cubic perovskite structure. The material also shows semiconductor behavior with a direct band gap, making it suitable for photovoltaic applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Physics, Condensed Matter
Boucharef Mohamed, Abbes Boucheta, Chaker Yassine, Lakhdar Djoudi, Mostefa Merabet, Salaheddine Benalia, Rafik Belghit
Summary: This article demonstrates the impact of stacking periodicity on the structural, electrical, and magnetic properties of the (MnAs)n/(AlAs)n Superlattice. The results reveal that the lattice constant and total magnetic moment of the superlattices increase linearly with the number of layers. Different behaviors in terms of metallic and semi-metallic properties are observed for different compositions, and the magnetic moment of the superlattices originates from the d states of the Mn atom. This research suggests that controlling the number of MnAs layers can be used to engineer the magnetic properties of the MnAs/AlAs superlattice for spintronic device applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
M. Y. Raia, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, N. Benzakour, K. Bouslykhane
Summary: Density functional theory (DFT) calculations using FP-LAPW method were performed to investigate the structural, thermodynamic, electronic, magnetic, optical, and thermoelectric properties of the Tb2Rh3Ge alloy. Ferromagnetic state was found to be more stable than paramagnetic state based on lattice parameter optimization. The alloy exhibited a ferromagnetic metallic character. Optical parameters and thermal properties were calculated.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Muhammad Noman, R. Neffati, Shamim Khan, Kashif Murad, Muhammad Waqar Ashraf, G. Murtaza
Summary: Variant perovskites of the halide family have gained attention due to their favorable characteristics. This study investigates the structural, electronic, and optical properties of Cs2BX6 using the FP-LAPW + lo method. The results show a gradual decrease in the band gap from Cl to Br and I. The materials exhibit wide energy gaps and rising peaks in the ultraviolet region, indicating their potential for high frequency applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Applied
Amina Touia, Chaima Khobzaoui, Maroua Benkhaled, Meriem Fodil
Summary: In this study, first-principles calculations were used to investigate the structural, elastic, electronic, and magnetic properties of Half-Heusler ErPtBi and HoPtBi compounds. The compounds were found to exhibit metallic characteristics and ferromagnetic states at optimized lattice constants in a stable type (III) structure.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2021)
Article
Materials Science, Multidisciplinary
M. Bikerouin, M. Balli, J. D. Correa, M. E. Mora-Ramos
Summary: The optoelectronic properties of Cu-III-VI2 chalcopyrites-based materials were investigated using the mBJ potential and DFT + U approach, with calculated theoretical efficiency limits for solar cells. The results showed promising candidates with higher power conversion efficiency, particularly CuInS2 achieving 30.25% SLME at a 500 nm film width.
CURRENT APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Kunal Labar, A. Shankar, Ranjan Sharma
Summary: This study presents a comparison of the properties of a new equiatomic quaternary Heusler alloy PtRuTiZ (Z = Al and Si) under the GGA and GGA + U schemes, and explores its potential as a half-metallic material for spintronic devices. These alloys, which have the LiMgPdSn (Y-type) structure with the space group F-43 m, are thermodynamically and mechanically stable. The electronic properties suggest that these materials exhibit half-metallicity under the GGA + U scheme, with a half-metallic gap of 0.07 eV and 0.1 eV for PtRuTiAl and PtRuTiSi, respectively, indicating their suitability for power electronic applications. PtRuTiSi is found to be more rigid and stiffer than PtRuTiAl, and their magnetic properties follow the Slater - Pauling rule of MT = ZT - 24 under the GGA + U scheme. The broader range of pressure over which PtRuTiSi (-1 GPa to 14 GPa) retains its half-metallic behavior, compared to PtRuTiAl (-3 GPa to 4 GPa), may be related to their bulk modulus.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
A. Ezaier, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, A. Hourmatallah, N. Benzakour, K. Bouslykhane
Summary: In this study, the structural, electronic, magnetic, thermodynamic, optical, and thermoelectric properties of Nd (Co1-xFex)2 compounds were investigated using density functional theory (DFT) with the Generalized Gradient Approximation (GGA) and GGA + U methods. The results showed that the Nd(Co0.5 Fe0.5)2 alloy had a total magnetic moment of 17.73 mu B/f.u. according to the GGA method and 18.21 mu B/f.u. with the GGA + U method. The effects of temperature on thermal properties were studied using the quasi-harmonic Debye model. The compound Nd(Co0.25 Fe0.75)2 exhibited significant optical properties such as a static refractive index of n(0) = 28.0 and an optical conductivity of 10431 (omega.cm)-1.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
H. Abbassa, S. Meskine, A. Labdelli, S. Kacher, T. Belaroussi, B. Amrani
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
C. Abbes, S. Belbachir, H. Abbassa, S. Meskine, A. Boukra, A. Boukortt
Summary: In this study, various density functional theory methods were used to investigate the structural, elastic, electronic, and magnetic properties of CoZrMnZ (Z = P, As, Sb) quaternary Heusler alloys. The compounds were found to exhibit half-metallic behaviour, mechanical and dynamic stability, with potential for spintronic applications.
PHILOSOPHICAL MAGAZINE
(2021)
Article
Materials Science, Multidisciplinary
El Habib Abbes, Hamza Abbassa, Said Meskine, Abdesamed Benbedra, Abdelkader Boukortt
Summary: In this study, the electronic and magnetic properties of Ni2MnGa Heusler alloy were investigated using Density Functional Theory. The focus was on the structural transition between tetragonal and cubic structures and its influencing factors. Results show that the tetragonal phase is the ground state for Ni2MnGa at 0K, with the alloy exhibiting double possibility of phase transition under thermal effect and uniaxial stress.
PHILOSOPHICAL MAGAZINE
(2022)
Article
Materials Science, Multidisciplinary
Mohammed Ridha Benzidane, Rabia Melati, Mansour Benyamina, Said Meskine, Pierre Spiteri, Abdelkader Boukortt, Tekkouk Adda Benattia
Summary: This study presents a detailed design of a dual-layer inductor structure for a DC-DC boost converter in photovoltaic applications, aiming for high efficiency and low losses. The research covers the impact of coil's conductor thickness, the gap effect study, and determination of the equivalent electrical circuit using transmission lines method.
TRANSACTIONS ON ELECTRICAL AND ELECTRONIC MATERIALS
(2022)
Article
Physics, Condensed Matter
H. Hedjar, S. Meskine, H. Bennacer, A. Boukortt, Y. Benaissa Chrif
Summary: The study shows that the magnetic properties of CdS can be altered by doping Gd and Mn, with CdS: (Gd, Mn) exhibiting a wider range of potential applications.
COMPUTATIONAL CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Oumkeltoum Mezilet, Abdenacer Assali, Said Meskine, Abdelkader Boukortt, M. S. Halati
Summary: Ab initio DFT calculations were used to investigate the properties of lead-free perovskite Na0.5Bi0.5TiO3 (NBT) crystals, including structural, electronic, elastic, piezoelectric, thermodynamic, and thermoelectric properties. The results showed that NBT crystals have good stability and excellent piezoelectric and thermoelectric performance, making them promising candidates for manufacturing high-performance piezoelectric devices and developing high-power thermoelectric generators.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Physics, Condensed Matter
H. Hedjar, S. Meskine, A. Boukortt, H. Bennacer, M. R. Benzidane
Summary: Theoretical study on RE-doped zinc sulphide in a zinc blende phase shows improved electronic, magnetic, and optical properties, with half-metallic behavior, stability, and redshift, while exhibiting broad absorption in the UV region. Doping with RE is a feasible method to enhance the material for optoelectronic and spintronic applications.
COMPUTATIONAL CONDENSED MATTER
(2022)
Article
Physics, Condensed Matter
H. Hedjar, S. Meskine, A. Boukortt, H. Bennacer, A. Benaouad
Summary: In this study, the optoelectronic and magnetic properties of Co-doped and (Co, Sm) co-doped ZnS were investigated using density functional theory and first principles calculations. The results showed that co-doping increased the lattice parameter and improved the magnetic properties. ZnS: Co was found to be a semiconductor, while ZnS: (Co, Sm) exhibited half-metallic behavior in the visible region. The improved optical and magnetic properties make (Co, Sm) co-doped ZnS a promising candidate for future optoelectronic and spintronic devices.
COMPUTATIONAL CONDENSED MATTER
(2022)
Article
Physics, Applied
Abdesamed Benbedra, Said Meskine, Abdelkader Boukortt, Roland Hayn, Hamza Abbassa
Summary: We conducted a computational study on the crystal structure and electric polarization of strained wurtzite III-V nitrides and II-VI oxides using density functional theory and the Berry phase method. The study aimed to investigate the effects of compressive uniaxial strain along the hexagonal c-axis on lattice parameters, piezoelectric polarization, and piezoelectric constant. Our results showed that imposing such strain enhanced the piezoelectric response, increasing both polarization and piezoelectric coefficient. The internal parameter of the wurtzite structure also increased with uniaxial strain, eventually resulting in a phase transition into a layered hexagonal structure. Furthermore, we discussed the enhanced piezoelectricity's physical origin, attributing it to a strong increase in the response of the internal parameter to strain.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ahlam Benaouad, Said Meskine, Abdelkader Boukortt, Abdesamed Benbedra, Hadj Larbi Beklaouz
Summary: In this study, first-principles calculations based on density functional theory and the semi-classical Boltzmann method were performed to investigate the structural, mechanical, electronic, and thermoelectric properties of rare Earths filled skutterudites. The results show that these compounds are n-type semiconductors with high effective mass and narrow bandgap. The focus was on the effect of filler rare Earth elements on the thermoelectric response, and the computed properties in the temperature range from 400 K to 1000 K indicate that RE-filled skutterudites can achieve low thermal conductivity and high Seebeck coefficient, making them promising thermoelectric materials at high temperatures.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Oumkeltoum Mezilet, Abdenacer Assali, Salim Benaissa, Said Meskine, Abdelkader Boukortt, Loubna Chaabane
Summary: In this study, the structural, electronic, thermodynamic, and thermoelectric properties of wurtzite yttrium aluminum nitride (YxAl1-xN) semiconductor alloys were investigated. The results show that the lattice parameters and electronic structures of the alloy can be controlled by doping yttrium, and it has emission wavelengths in the ultraviolet spectrum. Moreover, the thermodynamic and electronic transport properties of the alloy were analyzed. Overall, wurtzite YxAl1-xN crystal is a promising candidate for potential applications in optoelectronics (UV) and future green energy systems.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Physics, Multidisciplinary
Khadidja Missoum, Said Meskine, Abdelkader Boukortt, Ahlam Benaouad, Nabila Mehtougui
Summary: This study investigates the structural, elastic, dynamical, mechanical, and thermodynamic properties of the binary intermetallic compound CaIn in different crystallographic phases using DFT calculations. The compound is found to be chemically and mechanically stable, with a brittle character. These findings suggest its potential applications as a hydrogen storage material and in various other fields.
Article
Materials Science, Multidisciplinary
Abdesamed Benbedra, Said Meskine, Abdelkader Boukortt, Hamza Abbassa, El Habib Abbes
Summary: This study investigates the polarization properties of wurtzite III-nitride ternary alloys and quaternary alloy heterostructures using a layered-hexagonal structure as a reference. The results show a linear dependence of spontaneous and piezoelectric polarizations on alloy concentration, following Vegard's law. The research also demonstrates the possibility of designing heterostructures with no built-in electric fields, leading to high-efficiency optical devices. The simulation results are validated by comparing them with available theoretical and experimental data.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
E. H. Abbes, H. Abbassa, S. Meskine, I. Bouhamou, A. Boukortt
Summary: In this study, ab initio calculations and density functional theory (DFT) calculations were used to investigate the electronic and magnetic properties of NiCoMnSi1-xAlx quaternary Heusler compounds. The results showed a structural transition from cubic to other forms as the concentration reached 0.50, which can be attributed to the Jahn-Teller effect. Additionally, it was found that the NiCoMnAl alloy exhibited 100% spin polarization and behaved as a half-metal at the Fermi level.
JOURNAL OF NEW TECHNOLOGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
B. Benchehida, H. Abbassa, S. Meskine, E. H. Abbes
Summary: This study investigates the structural, electronic, and optical properties of FeVSb, a half Heusler compound, under uniaxial and hydrostatic stress through first-principles calculations. The results show that FeVSb has a cubic structure as the ground state, but undergoes a structural phase transition under uniaxial stress. Furthermore, the uniaxial stress weakens the optical properties of the material.
JOURNAL OF NEW TECHNOLOGY AND MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Spyridon G. Kosionis, Emmanuel Paspalakis
Summary: In this study, we theoretically investigate the pump-probe response and the four-wave mixing spectrum in a hybrid system composed of a semiconductor quantum dot and a spherical metal nanoparticle. Using a density matrix methodology, we calculate the absorption/gain, dispersion, and four-wave mixing spectra, and analyze their spectral characteristics. We also apply the metastate theory and the dressed-state picture to predict the positions of the spectral resonances.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
L. S. Lima
Summary: This study investigates quantum correlation and entanglement in the non-Hermitian Hubbard model. By analyzing quantum entanglement measures such as entanglement negativity and entropy, the effect of non-Hermitian imaginary hopping on the system is explored. It is found that in the large... limit, the non-Hermiticity reverses the behavior of the ground state energy and low-lying excitations.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Nam-Chol Ri, Chung-Sim Kim, Sang-Ryol Ri, Su-Il Ri
Summary: By decreasing the lattice thermal conductivity of GNR through chemical derivation and strain, enhancing the thermoelectric properties of the electron part can be an important method to approach PGEC. This paper proposes synthesized hybrid systems formed by chemical derivation in the middle parts of b-AGNRs, and investigates the band structures and thermoelectric properties of the electron part under different strains. The results show that the band gaps of the systems significantly increase under different strains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Le T. T. Phuong, Tran Cong Phong
Summary: This study investigates the effects of gas molecules adsorbed on /312-borophene on its electronic heat capacity and thermal Schottky anomaly. The results show that the adsorbed gas molecules have different impacts on the electronic heat capacity, leading to the generation of various new energy levels.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Tianyan Jiang, Jie Fang, Wentao Zhang, Maoqiang Bi, Xi Chen, Junsheng Chen
Summary: This paper investigates the adsorption and sensing properties of transition metal-doped WSSe gas-sensitive devices towards H2, CO, and CO2 gases related to thermal runaway in Li-ion batteries using density functional theory. The results show that Ti, Mn, and Mo dopants preferentially bind to the S-surface of the WSSe monolayer, and all three monolayers exhibit significantly improved sensing characteristics, with chemisorption towards CO. Band structure analysis suggests that the Ti-WSSe monolayer has the potential to be used as a resistive CO detection sensor. Recovery time calculations indicate the reuse capabilities of the gas-sensitive devices. Mn-WSSe monolayer shows potential for H2 detection, while Mo-WSSe monolayer is more suitable for CO2 detection. This work lays the foundation for potential gas-sensitive applications of WSSe monolayer in thermal runaway scenarios, advancing research in gas sensing domains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Olga A. Alekseeva, Aleksandr A. Naberezhnov, Ekaterina Yu. Koroleva, Aleksandr Fokin
Summary: This study investigates the temperature dependence of crystal structure and dielectric response in a nanocomposite material containing porous glasses and embedded sodium nitrate. The results reveal a crossover point in the temperature dependence of the order parameter of the structural transition in sodium nitrate nanoparticles, as well as a decrease in activation energy of sodium ions hopping conductivity during heating.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Lijun Cheng, Fang Cheng
Summary: This paper investigates the effects of electric and magnetic fields on the Goos-Hanchen (GH) shift in a semi-Dirac system. The results show that the magnitude and direction of the GH shift depend on various factors such as incidence angle, electric barrier height and width, and magnetic field. It is observed that there is a saltus step in GH shifts at the critical magnetic field, which decreases with increased potential barrier thickness. Additionally, the GH shift can be significantly enhanced by applying an electric field in the III region. These findings are important for the development of semi-Dirac based electronic devices.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Alexander K. Fedotov, Uladzislaw E. Gumiennik, Julia A. Fedotova, Janusz Przewoznik, Czeslaw Kapusta
Summary: The study conducted an improved analysis of carrier transport in single-layer graphene and hybrid structures, showing the coexistence of negative and positive contributions in magnetoresistive effect. Various models were used to analyze the dependences on temperature and magnetic field, providing insights into the behavior of electrical resistance in the structures.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xuhui Peng, Tao Chen, Ruotong Chen, Shizheng Chen, Qing Zhao, Xiaoping Huang
Summary: In this study, a novel method was proposed to design and fabricate optoelectronic devices with highly precise controlled photorefractive liquid crystal structures. By utilizing quantum dots and electric tuning, a regular periodic grating was formed in a quantum dot-doped liquid crystal volume illuminated by a laser standing evanescent wave field. The obtained optical diffraction pattern showed equally spaced light spots and high diffraction efficiency, indicating a significant change in the refractive index of the nanostructured device.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Kai-Hua Yang, Xiao-Hui Liang, Huai-Yu Wang, Yi-Fan Wu, Qian-Qian Yang
Summary: In this work, a theoretical model is proposed to achieve the controllability of quantum interference and decoherence. The effects of intralead Coulomb interaction, interdot tunneling, and electron-phonon interactions on differential conductance are investigated. The results show the appearance of destructive interference, Fano interference, and negative differential conductance in strong dot-lead tunneling regions, while a characteristic pattern of positive and negative differential conductances appears in the weak dot-lead tunneling regime.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xueying Wang, Qian Ma, Qi Zhang, Yi Wang, Lingyu Li, Dongheng Zhao, Zhiqiang Liu
Summary: Porous double-channel alpha-Fe2O3/SnO2 heterostructures with tunable surface/interface transport mechanism were successfully fabricated by electrospinning and calcination. These heterostructures exhibited a large specific surface area, providing more active sites and enhanced adsorption capacity. The optimal composite materials showed the highest response value and the fastest response/recovery times to DMF, along with good cycling performance, long-term stability, and high gas selectivity.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Donglin Guo, Zhengmeng Xu, Chunhong Li, Kejian Li, Bin Shao, Xianfu Luo, Jianchun Sun, Yilong Ma
Summary: Using full electron-phonon interactions and the Boltzmann transport equation, this study investigates the phonon scattering channel and electrical properties of graphene under anharmonic phonon renormalization (APRN). The results show that the APRN reduces the phonon frequency and three-phonon phase space with increasing temperature, affecting the acoustic branch more than the optical branch. The thermal conductivity of graphene decreases after considering three- and four-phonon scattering, and the primary scattering channels are identified. Furthermore, the APRN increases the strength of electron-phonon coupling and leads to an increase in n-type electric resistance at room temperature.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Hongping Zhao, Man Zhao, Dayong Jiang
Summary: The study proposes a broadband photodetector with high response, high sensitivity, and controllable band by integrating quantum dots and highly conductive materials. The PD composed of ZnO film/PbS quantum dots heterostructure shows excellent photoresponse performance in the UV-Vis-NIR range, with the peak responsivity increased by 550%, accompanied by significant red shift, faster response, and recovery speed. By using RF magnetron sputtering to prepare ultra-thin ZnO film, the impact of PbS quantum dots on the photoelectric properties of ZnO film is comprehensively and systematically discussed.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Ye Xuan Meng, Liwei Jiang, Yisong Zheng
Summary: Manipulating magnetism by electrical means is an effective method for realizing ultra-low power spintronic-integrated circuits. In this study, it is demonstrated that the two-dimensional semiconductor material InO monolayer can be tuned to a half-metallic state by applying a gate voltage, providing theoretical guidance for adjusting two-dimensional magnetic semiconductors.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Anusha Kachu, Aalu Boda
Summary: In this research, we investigated the impact of confinement nature on a neutral hydrogenic donor impurity in a quantum dot. The study demonstrated intriguing behavior in response to changes in potential shape, quantum dot parameters, and spin-orbit coupling strengths. The findings provide valuable insights into the fundamental physics of quantum dots and impurities and can aid in the design and optimization of QD-based technologies.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
