Article
Multidisciplinary Sciences
Zainab Gholami, Farhad Khoeini
Summary: The study investigated the spin-dependent transport properties in hybrid graphene/silicene nanoribbons and found that a pure thermal spin current can be obtained by modulating the temperature, while a negative differential thermoelectric resistance was observed.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Marta Martinez-Abadia, Rajeev K. Dubey, Mercedes Fernandez, Miguel Martin-Arroyo, Robert Aguirresarobe, Akinori Saeki, Aurelio Mateo-Alonso
Summary: This study demonstrates that twisted molecular nanoribbons can self-assemble into ordered gels, and their morphologies and sol-gel transitions vary with the length of the nanoribbons. The nanoribbon gels also exhibit red fluorescence and pseudoconductivity values in the same range as current state-of-the-art gels.
Article
Physics, Applied
Yun-Lei Sun, Guo-Hong Chen, Peng-Ying Du, Jia-Hong Fu, En-Jia Ye, Jia-En Yang, Hang Xie
Summary: In this study, a Y-shaped nanojunction composed of zigzag silicene nanoribbons has been proposed for charge/spin transport manipulation. Various edge modes can be engineered in this nanostructure, allowing for the creation of charge current switcher, spin current router, and spin filter functionalities for potential applications in electronic and spintronic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Kumar Gaurav, Anurag Srivastava
Summary: This study applies density functional theory and non-equilibrium Green's function formalism to investigate the voltage-dependent spin transport properties of a spin-field effect transistor based on silicene nanoribbons. The results show that the device exhibits excellent spin filtering effect and oscillatory transfer characteristics, and can potentially be used as a multifunctional spintronic and spin caloritronic device.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Masae Takahashi
Summary: The emergence of two-dimensional materials like graphene has advanced nanotechnology rapidly. Silicene, a silicon analogue of graphene, has the advantage of compatibility with silicon nano-technology processes but faces issues of instability and synthesis methods affecting its structure. Researchers have now successfully designed flat zigzag silicene nanoribbons, showing stable properties with unique band gaps and dispersive behavior.
Article
Materials Science, Multidisciplinary
J. G. Rojas-Briseno, M. A. Flores-Carranza, P. Villasana-Mercado, S. Molina-Valdovinos, I Rodriguez-Vargas
Summary: The study shows that introducing periodic modulation in silicene-based magnetic superlattices can lead to oscillating conductance and enhance tunneling magnetoresistance by obtaining a conductance gap in the antiparallel magnetization configuration. In terms of spin-valley polarization, well-defined polarization states can be achieved by inducing structural asymmetry, resulting in an additional enhancement of tunneling magnetoresistance.
Article
Chemistry, Physical
Qiuxia Lu, Shijie Xie, Fanyao Qu
Summary: The study introduces a spin diffusion theory to predict unusual pure spin current transport in unintentionally doped organic semiconductors. Experimental results demonstrate the feasibility of pure spin current transport via polaron hopping at low carrier density. Interestingly, the spin diffusion length (SDL) can be prolonged by controlling molecular geometry structural disorder and reducing reorganization energy, opening up new possibilities for designing organic spintronics devices with long SDL and low carrier density.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Multidisciplinary
Mohammed M. El-Banna, Adel Helmy Phillips, Ahmed Saeed Abdelrazek Bayoumi
Summary: Theoretical investigations of valley-spin caloritronic transport properties of ferromagnetic silicene superlattice under ac-field effect are conducted using the transfer matrix method at various frequencies. The study focuses on describing resolved thermoelectric parameters and reveals an oscillatory behavior in all investigated thermoelectric parameters, which may be due to photon-assisted tunneling. Improved power factors are observed and attributed to the quantum confinement effect. The findings suggest that ferromagnetic silicene superlattice shows promise for energy harvesting and cooling applications in nanodevices.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yun Ni, Hu Hua, Jia Li, Ni Hu
Summary: The study focuses on a heterojunction composed of specific graphene and graphyne nanoribbons, showing potential for spintronic and spin caloritronic devices with excellent properties. The proposed heterojunction offers promise for multi-effect and low-power-consumption electronic devices.
Article
Physics, Applied
Juliana M. da Silva, Fernando A. F. Santana, Jorge G. G. S. Ramos, Anderson L. R. Barbosa
Summary: In this study, we investigate the behavior of the spin Hall effect in a system with disorder and interface-induced spin-orbit coupling by experimental and numerical simulations of single-layer graphene devices. The results show that the spin Hall angle of graphene devices exhibits mesoscopic fluctuations and follows a universal relationship with the dimensionless longitudinal conductivity.
JOURNAL OF APPLIED PHYSICS
(2022)
Review
Physics, Applied
Guangsai Yang, Lina Sang, Chao Zhang, Ning Ye, Alex Hamilton, Michael S. Fuhrer, Xiaolin Wang
Summary: Thermoelectric materials and devices play a crucial role in renewable thermal-to-electrical energy conversion. The optimization of thermoelectric performance can be achieved by manipulating charge, lattice, spin, and orbital. The emerging field of spin caloritronics, which explores the interplay among heat, charge, and spin, introduces innovative mechanisms and versatile functionalities for thermal-to-electrical energy conversion. This review discusses the recent progress in spin caloritronics, including the role of spin-related mechanisms in improving charge-based thermoelectric performance and the developments in magneto-thermoelectricity and thermospin effects.
NATURE REVIEWS PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Mubashir A. Kharadi, Gul Faroz A. Malik, Sparsh Mittal
Summary: This article introduces a spin caloritronic device based on zigzag silicene nanoribbons, which generates spin current by applying thermal gradient without any external electrical bias and exhibits a high value of thermally assisted magnetoresistance.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Physics, Multidisciplinary
K. A. Gonzalez, C. D. Nunez, P. A. Orellana, L. Rosales
Summary: In this study, the thermoelectrical properties of a silicene nanoribbon heterostructure with a central fully doped conductor and two pristine leads were investigated. Using a tight-binding Hamiltonian, the thermoelectric properties of the system were calculated as a function of confinement and external field. The results showed an enhancement of thermopower in the presence of a transverse electric field and a violation of the Wiedemann-Franz law near the ad-atom energy. These findings indicate that the thermoelectric properties of doped silicene nanoribbons can be efficiently controlled with external perturbations.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Marko D. Petrovic, Priyanka Mondal, Adrian E. Feiguin, Branislav K. Nikolic
Summary: The standard model of spin-transfer torque in antiferromagnetic spintronics does not capture the ground state entanglement of quantum spins, requiring a fully quantum treatment to understand the exchange of spin angular momentum. This new approach predicts a nonzero expectation value of localized spins in antiferromagnetic Mott insulators when subjected to spin-polarized current pulses, leading to a spatially inhomogeneous ferromagnetic phase with a zigzag profile. The total spin absorbed by AFMI increases with electron-electron repulsion, as well as when there is no charge exchange between layers.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Z. Abbasi Azad, A. Shokri, M. S. Akhoundi Khezrabad
Summary: By studying the properties of silicon nanoribbons through calculations, it was found that different types of doping atoms can change its conductivity properties, leading to nonlinear behavior in current-voltage curves.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Physics, Multidisciplinary
Fei Wan, X. R. Wang, L. H. Liao, J. Y. Zhang, M. N. Chen, G. H. Zhou, Z. B. Siu, Mansoor B. A. Jalil, Yuan Li
Summary: We studied the effect of strain and on-site energies on the band structure and valley-dependent transport properties of graphene heterojunctions. It was found that strain and on-site energies can be utilized to achieve valley-dependent separation of electrons. Transmission values can be effectively adjusted by changing the strength of strain, while the transport angle remains unchanged. When an extra on-site energy is applied, not only are the electrons separated into distinct transmission lobes in opposite directions, but the transport angles of the valleys can also be significantly changed. This research provides a means to modulate valley-dependent transport in graphene-based valleytronics devices.
Article
Physics, Multidisciplinary
Xiongwen Chen, Qian Wang, Ping Wu, Guanghui Zhou
Summary: In this article, an AA-stacked multilayer graphene nanoribbon with two symmetrical armchair edges is proposed as a multiple flat-band material. By manipulating an electric field, the bandgaps and localized states of the flat bands can be controlled. Thus, these ribbons could be excellent candidates for designing controllable information transmission and optical-electric nanodevices.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Chengke Xu, Ping Ning, Chenxi Luo, Liemao Cao, Xiaohui Deng, Guanghui Zhou
Summary: Using density functional theory (DFT) and non-equilibrium Green's function (NEGF), this study investigates the electronic band structures and transport properties of zigzag rhombic N-graphyne nanoribbons (ZrNGYNRs). The results reveal metallic band structures in ZrNGYNRs with different symmetries and distinct spin splitting in the ferromagnetic state, suggesting potential applications in nanoelectronics.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Xianzhe Zhu, Wang Chen, Xiaoying Zhou, Benhu Zhou, Guanghui Zhou
Summary: This theoretical study investigates the quantum magneto-transport property of a two-dimensional semi-Dirac system under a perpendicular magnetic field. The results show that the Landau levels (LLs) follow a power law relationship with the magnetic field and level index, and the Hall conductance and Shubnikov-de Haas oscillation exhibit quantized behavior. The hall resistance is dependent on the magnetic field and the longitudinal resistance shows distinct peaks in different magnetic field regimes.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Xiansheng Dong, Huili Li, Tong Chen, Liang Xu, Guanghui Zhou
Summary: In this study, density functional theory was used to modify and simulate the structures of tungsten telluride (WTe2) and investigate the impact of vacancy defects and substitutional doping on its electronic properties. The results show that different defect structures and doping atoms can significantly alter the conductivity and magnetism of WTe2. This work is important for deepening our understanding of the nanomaterial WTe2 and accelerating its future applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Physics, Condensed Matter
Huaihua Shao, Guanghui Zhou
Summary: The properties of the edge states in a selected twisted bilayer graphene nanoribbon were studied, and a remarkable rule of local electronic transfer was discovered. The influence of a transverse electric field and edge defects on the edge states was also discussed.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Xiansheng Dong, Tong Chen, Guogang Liu, Luzhen Xie, Guanghui Zhou, Mengqiu Long
Summary: This study investigates the electronic, spin-resolved transmission, and gas sensing properties of 2D g-C4N3/MoS2 van der Waals heterostructure. The study reveals that this heterostructure exhibits ferromagnetic half-metallicity, high adsorption capacity for gas molecules, and directional-dependent transport behavior. The g-C4N3/MoS2-based gas sensor shows high sensitivity to CO, NO, NO2, and NH3 molecules. This work demonstrates the potential of g-C4N3/MoS2 heterostructure in spintronics and gas sensing applications.
Article
Materials Science, Multidisciplinary
Yi Fang, Ziyi Shen, Meng Zhang, Xiaohui Deng, Liemao Cao, Guanghui Zhou
Summary: By embedding iron atom and substituting C-C bond or C-N bond, we can induce ferromagnetism of two-dimensional non-magnetic materials and obtain different ferromagnetic metals, half-metals and ferromagnetic semiconductors. The electron properties in wider C3N nanoribbons are directly related to the substitution position of the iron atom. The constructed devices using half-metallic nanoribbons and C3N nanoribbons exhibit various physical effects, with spin filtering efficiency reaching 99%. Our findings open up a new avenue for C3N-based electronic and spintronic devices.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Guogang Liu, Tong Chen, Guanghui Zhou, Zhonghui Xu, Xianbo Xiao
Summary: In this work, multiferroic van der Waals heterostructures consisting of FeI2 and In2S3 monolayers were explored for their electronic structures and transport properties. It was found that the FeI2 monolayer can be switched between semiconducting and half-metallic properties by controlling the ferroelectric polarization states of In2S3. Furthermore, it was demonstrated that the FeI2/In2S3 heterostructure exhibits high selectivity and sensitivity as a gas sensor, with reversible capture behavior for NH3.
Article
Chemistry, Physical
Zhongyu Liu, Yuqi Zheng, Meng Zhang, Liemao Cao, Guanghui Zhou
Summary: C3N is expected to be an ideal material for future high-strength electronic devices due to its excellent properties. By using first principles calculations, we have systematically studied the electronic properties of sawtoothlike C3N nanoribbons. Passivation of the nanoribbon edges with hydrogen atoms can enhance stability and change its electronic properties. Furthermore, we propose a molecular junction based on zigzag graphene nanoribbons electrode, which can be used as a rectifier or a spin valve. These findings expand the application of C3N in nanoelectronic devices.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Hongxing Li, Wei-Bing Zhang, Guanghui Zhou
Summary: By employing first-principles calculations, we have predicted strong Dzyaloshinskii-Moriya interactions (DMIs) in CrI3/Metal heterostructures. This is attributed to the large spin-orbit coupling of the I atom and the structural distortion in the CrI3 layer caused by the substrates. Our findings offer a new approach to induce DMI in layered magnetic materials.
NEW JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Physical
Danfeng Qin, Tong Chen, Luzhen Xie, Ning Yang, Cheng Luo, Guanghui Zhou
Summary: A study on the electronic transport properties of grapheneplus (G+), nitrogen-doped graphene (NG+), and boron-doped graphene (BG+) was conducted using density functional theory and non-equilibrium Green's function method. The results showed that G+ exhibited excellent properties and the electron mobility could be controlled by doping. Moreover, the gas sensitivity of NG+ was higher than G+ and BG+ in detecting organic gases.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Liemao Cao, Xiaohui Deng, Guanghui Zhou, Shi-Jun Liang, Chuong V. Nguyen, L. K. Ang, Yee Sin Ang
Summary: This study investigates the electronic and transport properties of multiferroic van der Waals heterostructures composed of FeCl2 and Sc2CO2. The results show that the heterostructure can be switched from a semiconductor to a half-metal by modulating the ferroelectric polarization states. The findings demonstrate the potential of these heterostructures for compact information processing, data storage, and spintronics devices.
Article
Materials Science, Multidisciplinary
Hongxing Li, Wei-Bing Zhang, Guanghui Zhou
Summary: This study constructs vdW heterostructures composed of p- and d-magnetic layers and discovers strong interlayer magnetic interaction. By changing the interlayer magnetic order, the electronic structures and magnetic anisotropy of the heterostructures are significantly altered, providing inspiration for designing vdW heterostructures with controllable electronic structures through magnetism.
Article
Materials Science, Multidisciplinary
Xiaobo Li, Fei Qi, Rundong Zhao, Zijie Qiu, Yun Li, Mengqiu Long, Guanghui Zhou
Summary: A recent theoretical study has demonstrated that the conductivity of a graphene nanoribbon with gear-like molecules can be controlled by changing the electric field strength and molecular orientation. This design allows for the creation of conductance switches and rotational switches, and has potential applications in molecular motors and other nanoscale devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
