Article
Multidisciplinary Sciences
Aditya Sood, Xiaozhe Shen, Yin Shi, Suhas Kumar, Su Ji Park, Marc Zajac, Yifei Sun, Long-Qing Chen, Shriram Ramanathan, Xijie Wang, William C. Chueh, Aaron M. Lindenberg
Summary: Understanding the pathways and time scales underlying electrically driven insulator-metal transitions is vital for uncovering the fundamental limits of device operation. By using stroboscopic electron diffraction, researchers discovered an electrically triggered, isostructural state that forms transiently on microsecond time scales and established electrical excitation as a route for uncovering nonequilibrium and metastable phases in correlated materials. This metastable phase is similar to that formed under photoexcitation within picoseconds, suggesting a universal transformation pathway.
Article
Chemistry, Multidisciplinary
Ryota Teruya, Tetsu Sato, Masahiro Yamashita, Noriaki Hanasaki, Akira Ueda, Masaki Matsuda
Summary: This study demonstrates the reversible control of a molecular Mott insulator by chemical carrier doping and dedoping, highlighting the importance of chemical doping in molecular Mott insulators.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Federico Mazzola, Sandeep Kumar Chaluvadi, Vincent Polewczyk, Debashis Mondal, Jun Fujii, Piu Rajak, Mahabul Islam, Regina Ciancio, Luisa Barba, Michele Fabrizio, Giorgio Rossi, Pasquale Orgiani, Ivana Vobornik
Summary: This study demonstrates a genuine Mott transition without any symmetry breaking side effects in thin films of V2O3 using material synthesis and photoelectron spectroscopy. The spectral signal evolves slowly over a wide temperature range approaching the metal-insulator transition, with the Fermi wave-vector remaining unchanged and a lower critical temperature than that reported for the bulk.
Article
Chemistry, Multidisciplinary
Quanzhen Zhang, Yanhui Hou, Teng Zhang, Ziqiang Xu, Zeping Huang, Peiwen Yuan, Liangguang Jia, Huixia Yang, Yuan Huang, Wei Ji, Jingsi Qiao, Xu Wu, Yeliang Wang
Summary: The researchers used scanning tunneling microscopy and spectroscopy to study the evolution of electronic structures at the interface of a phase-engineered monolayer NbSe2 heterostructure. They observed the penetration of the metallic state H-NbSe2 into the Mott insulating state T-NbSe2, with a prominent CDW proximity effect, and detected an insulating Mott gap collapse at the electronic phase transition region. Theoretical calculations suggested that this collapse could be attributed to electron doping induced by the interface, providing insights into controlling Mott insulating states through phase engineering.
Article
Materials Science, Multidisciplinary
Paul C. Lou, Anand Katailiha, Ravindra G. Bhardwaj, W. P. Beyermann, Dheeraj Mohata, Sandeep Kumar
Summary: In the metal/degenerately doped silicon bilayer structure, the interfacial flexoelectric effect leads to charge carrier transfer from metal layer to the silicon layer, resulting in an electronically polarized silicon layer with magnetism. By controlling the flexoelectronic doping, material behavior can be engineered for quantum, spintronics, and electronics applications in semiconductor materials.
Article
Multidisciplinary Sciences
Zhen Zhang, Sandip Mondal, Subhasish Mandal, Jason M. Allred, Neda Alsadat Aghamiri, Alireza Fali, Zhan Zhang, Hua Zhou, Hui Cao, Fanny Rodolakis, Jessica L. McChesney, Qi Wang, Yifei Sun, Yohannes Abate, Kaushik Roy, Karin M. Rabe, Shriram Ramanathan
Summary: Habituation and sensitization are fundamental forms of learning present in organisms, inspiring algorithmic simulations in artificial neural networks and potential use in neuromorphic computing. Nonassociative learning behavior of nickel oxide (NiO) is demonstrated under external stimuli, similar to biological species such as Aplysia. NiO's learning behavior results from dynamic modulation of its defect and electronic structure, with implications for new learning algorithms and addressing the stability-plasticity dilemma in artificial intelligence.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Yuki Nakata, Katsuaki Sugawara, Ashish Chainani, Hirofumi Oka, Changhua Bao, Shaohua Zhou, Pei-Yu Chuang, Cheng-Maw Cheng, Tappei Kawakami, Yasuaki Saruta, Tomoteru Fukumura, Shuyun Zhou, Takashi Takahashi, Takafumi Sato
Summary: The authors describe a Mott insulator state in monolayer 1T-TaSe2, which remains stable well above room temperature and displays robustness against external perturbations.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
C. Lagoin, U. Bhattacharya, T. Grass, R. W. Chhajlany, T. Salamon, K. Baldwin, L. Pfeiffer, M. Lewenstein, M. Holzmann, F. Dubin
Summary: The Hubbard model is a celebrated theoretical framework in condensed-matter physics. This study implements the extended Bose-Hubbard Hamiltonian by confining semiconductor dipolar excitons in an artificial two-dimensional square lattice, showcasing the characteristic features of checkerboard spatial order.
Article
Physics, Multidisciplinary
Hongyuan Li, Shaowei Li, Mit H. Naik, Jingxu Xie, Xinyu Li, Emma Regan, Danqing Wang, Wenyu Zhao, Kentaro Yumigeta, Mark Blei, Takashi Taniguchi, Kenji Watanabe, Sefaattin Tongay, Alex Zettl, Steven G. Louie, Michael F. Crommie, Feng Wang
Summary: Transition metal dichalcogenide moire heterostructures provide an ideal platform for studying the extended Hubbard model, where long-range Coulomb interactions are crucial. A scanning tunnelling microscopy technique is described for sensing and manipulating correlated electrons in gated WS2/WSe2 moire superlattice, allowing experimental extraction of fundamental extended Hubbard model parameters. This technique enables imaging and manipulation of the charge state of correlated electrons at local moire sites.
Article
Materials Science, Multidisciplinary
Abhisek Samanta, Ahana Chakraborty, Rajdeep Sensarma
Summary: This study investigates the transition from a many-body localized phase to an ergodic phase in a spin chain with correlated random magnetic fields. Multiple statistical measures are used to determine the phase diagram, and it is found that the transition occurs at higher correlation values with increasing disorder. The average of the sample variance of magnetic fields is identified as a parameter that encodes the effects of correlated disorder.
Article
Physics, Multidisciplinary
Vyacheslav D. Neverov, Alexander E. Lukyanov, Andrey V. Krasavin, Alexei Vagov, Mihail D. Croitoru
Summary: This study reveals that when impurities are correlated with each other, the superconductivity becomes more robust and its properties can be controlled by spatial correlations.
COMMUNICATIONS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jingwei Dong, Dongbin Shin, Ernest Pastor, Tobias Ritschel, Laurent Cario, Zhesheng Chen, Weiyan Qi, Romain Grasset, Marino Marsi, Amina Taleb-Ibrahimi, Noejung Park, Angel Rubio, Luca Perfetti, Evangelos Papalazarou
Summary: We used angle and time-resolved photoelectron spectroscopy to study the commensurate charge density wave (CDW) phase of 1T-TaS2. We employed different probe pulse polarizations to map the dispersion of electronic states above and below the chemical potential. Upon photoexcitation, the fluctuations of CDW order erased the band dispersion and squeezed the electronic states near the chemical potential. This transient phase developed within half a period of coherent lattice motion and was influenced by strong electronic correlations. Our simulations indicated that the screening of Coulomb repulsion depended on the stacking order of the TaS2 layers. The entanglement of these degrees of freedom suggested that both the structural order and electronic repulsion were locally modified by the photoinduced CDW fluctuations.
Article
Chemistry, Physical
J. Falson, I. Sodemann, B. Skinner, D. Tabrea, Y. Kozuka, A. Tsukazaki, M. Kawasaki, K. von Klitzing, J. H. Smet
Summary: The study investigates low-temperature phases of strongly interacting electrons using zinc oxide-based two-dimensional electron systems, revealing correlated metallic and insulating states, non-monotonic spin polarizability, and a significant positive magnetoresistance. These findings establish zinc oxide as a platform for studying strongly correlated electrons in two dimensions.
Article
Chemistry, Physical
Benjamin A. Foutty, Jiachen Yu, Trithep Devakul, Carlos R. Kometter, Yang Zhang, Kenji Watanabe, Takashi Taniguchi, Liang Fu, Benjamin E. Feldman
Summary: By studying twisted double-bilayer WSe2, we have identified charge-ordered phases at multiple integer and fractional moire fillings. Through experiments with magnetic fields and displacement fields, we have observed spin-polarized ground states and a metal-insulator transition. These results demonstrate the control over spin and valley character in this system.
Article
Multidisciplinary Sciences
Dongxue Chen, Zhen Lian, Xiong Huang, Ying Su, Mina Rashetnia, Li Yan, Mark Blei, Takashi Taniguchi, Kenji Watanabe, Sefaattin Tongay, Zenghui Wang, Chuanwei Zhang, Yong-Tao Cui, Su-Fei Shi
Summary: In this study, the layer degree of freedom was introduced to the WSe2/WS2 moire superlattice by changing the number of layers of WSe2. Systematic changes in the optical spectra of moire excitons were observed, along with significant modifications in the energy resonances of moire excitons in multilayer WSe2/monolayer WS2 moire superlattice. The additional WSe2 layers also impacted the electronic correlation strength.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
K. K. Iyer, Ram Kumar, S. Rayaprol, K. Maiti, E. Sampathkumaran
Summary: The study reveals the impact of external pressure on the magnetic transitions of the exotic multiferroic material Tb2BaNiO5, causing an upward shift of T-N1 and a downward shift of T-N2. Additionally, chemical pressure induced by isoelectronic doping and doping on the Ba site also affects the transition temperatures of the compound.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Physics, Condensed Matter
Sakshi Bansal, Asif Ali, B. H. Reddy, Ravi Shankar Singh
Summary: In this study, we investigated the role of electron correlation in the electronic structure of honeycomb lattice Li2RuO3 using photoemission spectroscopy and band structure calculations. Our results reveal that Li2RuO3 is a Mott insulator, indicating the significant role of electron correlation in this system.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Swapnil Patil, Aniket Maiti, Surajit Dutta, Khadiza Ali, Pramita Mishra, Ram Prakash Pandeya, Arindam Pramanik, Sawani Datta, Srinivas C. Kandukuri, Kalobaran Maiti
Summary: Ir-based materials have gained attention due to their insulating phase driven by spin-orbit coupling, but IrO2 stands out with its metallic ground state. High-resolution photoemission spectroscopy reveals enhancement of Ir-O covalency in the bulk compared to the surface, and an increase in the spin-orbit split Ir core-level peaks in the bulk electronic structure. Valence-band spectra show dominant Ir 5d character near the Fermi level, with significant O 2p contributions at low temperatures, contradicting the purely spin-orbit coupling scenario proposed for these systems.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Physics, Multidisciplinary
Arindam Pramanik, Sangeeta Thakur, Bahadur Singh, Philip Willke, Martin Wenderoth, Hans Hofsaess, Giovanni Di Santo, Luca Petaccia, Kalobaran Maiti
Summary: This study investigates the properties of Dirac states in SiC-graphene and its hole-doped compositions using experimental and theoretical methods. The results show that the Dirac bands exhibit linear dispersion behavior across the Dirac point, even after boron substitution. The internal symmetries of SiC-graphene are preserved despite significant boron substitutions. These findings suggest that SiC-graphene has the potential to manipulate carrier properties and protect Dirac fermionic properties.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
A. Kataria, T. Agarwal, S. Sharma, A. Ali, R. S. Singh, R. P. Singh
Summary: This study provides a detailed investigation of the superconducting properties of Re-based pseudobinary telluride CP Mo4Re2Te8, revealing its superconducting ground state. The compound crystallizes in a trigonal structure and exhibits a fully gapped superconducting state in the moderate electron-phonon coupling limit, with a superconducting transition temperature of 3.26(3) K.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Condensed Matter
Asif Ali, B. H. Reddy, Ravi Shankar Singh
Summary: We studied the electronic structure of SrMoO3 using valence band photoemission spectroscopy and electronic structure calculations. We found a coherent feature close to the Fermi level in density functional theory (DFT) calculation, but an additional satellite at 3 eV binding energy was absent in our calculations. Different surface and bulk electronic structures were observed using surface sensitive photoemission spectroscopy. The bulk Mo 4d spectra were in good agreement with the DFT + DMFT spectral function, indicating moderate electron correlation strength.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Condensed Matter
M. Bharath, Jaskirat Brar, Himanshu Pant, Asif Ali, Sakshi Bansal, Ravi Shankar Singh, R. Bindu
Summary: In this work, we investigated the precursor effects to superconductivity in BaPb0.75Bi0.25O3 using temperature dependent resistivity, x-ray diffraction technique and photoemission spectroscopy. The compound exhibits superconductivity around 11 K (TC) and the synthesis procedure adopted is much simpler than the literature methods. Our results show an increase in both the orthorhombic and tetragonal strain above TC in the temperature range of 10 K-25 K. The observed well screened features in Bi and Pb 4f(7/2) core levels indicate the metallic nature of the sample. Energy dependence of the spectral density of states suggests a disordered metallic state.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Review
Materials Science, Multidisciplinary
Suvodeep Paul, Saswata Talukdar, Ravi Shankar Singh, Surajit Saha
Summary: Transition metal dichalcogenides (TMDs) are 2D materials with exfoliate layered structure and various properties. This review focuses on MoTe2, a TMD that exhibits different phases and transitions. The topological phase transition between the metallic-type 1T ' phase and the topological T-d phase is extensively studied, exploring its relation with crystal structure, charge transport, and electronic band structure. The review also discusses the effects of reduced dimensionality, pressure, charge doping, and chemical substitution on the structural transition and superconducting transition temperatures, and suggests correlations between these apparently unrelated transitions. Additionally, open questions are presented to stimulate further research in understanding the physics and potential applications of these phase transitions.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Abhishek Singh, Souvik Sasmal, Kartik K. Iyer, A. Thamizhavel, Kalobaran Maiti
Summary: This study investigates the electronic properties of WTe2, a type-II Weyl semimetal, and its evolution with Ni substitution. The results show that the XMR effect of WTe2 is weakened with Ni doping, and a metal-to-insulator transition is observed at low temperatures. The magnetoresistance exhibits an H-2 dependence and indicates the presence of multiple types of charge carriers, providing insights into the behavior of this class of materials and the tuning of charge carrier properties within the XMR regime.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Condensed Matter
Sawani Datta, Ram Prakash Pandeya, Arka Bikash Dey, A. Gloskovskii, C. Schlueter, T. R. F. Peixoto, Ankita Singh, A. Thamizhavel, Kalobaran Maiti
Summary: We studied the electronic structure of CeAgAs2, an antiferromagnetic Kondo lattice system, using hard x-ray photoemission spectroscopy. The results show surface-bulk differences, complex interplay of intra- and inter-layer covalency, and electron correlation in the electronic structure of CeAgAs2. The Ce and As core level spectra reveal strong hybridization and correlation effects. The bulk spectra exhibit additional interactions not present in the surface spectra. Temperature dependence of the spectra indicates a Kondo-like behavior.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Condensed Matter
S. Rayaprol, K. K. Iyer, A. Hoser, M. Reehuis, A. Morozkin, V Siruguri, K. Maiti, E. Sampathkumaran
Summary: A compound containing Tb ions, Tb5Si3, with a honeycomb network of Tb ions, shows complete suppression of the features attributable to long-range magnetic ordering by a critical applied field, mimicking the behavior of Kitaev physics candidates.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Sakshi Bansal, R. K. Maurya, Asif Ali, B. H. Reddy, Ravi Shankar Singh
Summary: We study the effects of electron correlation and disorder on the electronic structure of layered nickelate (La0.5Sr0.5)(2)NiO4 using various spectroscopy techniques and theoretical calculations. The spectra indicate reduction in density of states at the Fermi level with lower temperature and show strong correlation in the system. The presence of disorder is evidenced by the dependence of spectral density of states on energy and temperature.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Kartik K. Iyer, Sudhindra Rayaprol, Ram Kumar, Shidaling Matteppanavar, Suneel Dodamani, Kalobaran Maiti, Echur V. Sampathkumaran
Summary: We investigate the electronic properties of R4PtAl (R = Ho and Er) using various measurements. Our results show antiferromagnetic order in Ho and Er compounds, as well as the presence of a spin-glass phase at lower temperatures. The resistivity data exhibit a weak minimum slightly above the respective Néel temperature, which is unusual for rare-earth materials with well-localized 4f states. We also observe a subtle field-induced magnetic transition and a large isothermal entropy change for both compounds. These findings provide insights for the development of magnetocaloric materials.
Article
Materials Science, Multidisciplinary
Sawani Datta, Ram Prakash Pandeya, Arka Bikash Dey, A. Gloskovskii, C. Schlueter, Thiago Peixoto, Ankita Singh, A. Thamizhavel, Kalobaran Maiti
Summary: We investigated the electronic structure of a Kondo lattice system, CeCuSb2, which exhibits significant mass enhancement and Kondo behavior. Through hard x-ray photoemission spectroscopy, we observed multiple features in the Ce core levels, attributed to strong final-state effects. Furthermore, the depth-resolved data showed that the intensity of these features changed significantly with the surface sensitivity of the probe. Both surface and bulk spectral functions were extracted, and a Kondo-like feature was observed at higher binding energies, in addition to well and poorly screened features.
Article
Materials Science, Multidisciplinary
Arindam Pramanik, Ram Prakash Pandeya, Denis V. Vyalikh, Alexander Generalov, Paolo Moras, Asish K. Kundu, Polina M. Sheverdyaeva, Carlo Carbone, Bhanu Joshi, A. Thamizhavel, S. Ramakrishnan, Kalobaran Maiti
Summary: This study used high-resolution ARPES to accurately determine the location of Dirac nodes in the noncentrosymmetric superconductor BiPd and constructed a model Hamiltonian to explain the observed anisotropy. The results help to reveal the anisotropy topology of the Dirac states accurately and have significant implications for the properties of topological superconductors.
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
