A5100742456- Quantum and electron transport phenomena
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor materials and devices
- Magnetic properties of thin films
- 2D Materials and Applications
- Physics of Superconductivity and Magnetism
- MXene and MAX Phase Materials
- Boron and Carbon Nanomaterials Research
- Graphene research and applications
- Surface and Thin Film Phenomena
- Chalcogenide Semiconductor Thin Films
- Molecular Junctions and Nanostructures
- Ferroelectric and Piezoelectric Materials
- Advancements in Battery Materials
- Carbon Nanotubes in Composites
- Multiferroics and related materials
- Advanced Thermoelectric Materials and Devices
- Advanced Condensed Matter Physics
- Topological Materials and Phenomena
- Perovskite Materials and Applications
Huaiyin Institute of Technology
2012-2023
Southeast University
2008-2009
In this work, the thermoelectric (TE) properties of CrI3 monolayer are studied using Boltzmann transport equation based on energy band from first-principles calculation. A strong spin-dependent Seebeck phenomenon is found. The positive (spin-Seebeck) coefficient at 800 K reaches up to 291 (263) μV K−1 describing p-type semiconductor character and figure merit as high 0.95, mainly originating unique structure monolayer. This indicates that may be a potential candidate for low dimensional spin...
We propose to use the quantum interference effect in a Rashba ring detect pure spin current driven by bias. By means of Keldysh Green's function method, we demonstrated that tunneling charge could be induced flowing through due combined electron precession phase from spin-orbit coupling (RSOC) and traveling difference two arms ring. The nonzero can used deduce not only magnitude bias but also its polarization. This depends on some system parameters such as RSOC strength asymmetry arms. Our...
We propose an electrical scheme for detection of pure spin current without charge by electron resonance (ESR). The is flowing through a two-dimensional gas (2DEG) heterojunction consisting two 2DEG electrodes with Rashba and/or Dresselhaus orbital interaction and nonmagnetic narrow strip between them. When ESR introduced in the system, interplay will lead to nonzero due breakdown dynamic time reverse symmetry system. induced current, not only its magnitude but also direction, can be...
We theoretically study the spin transport through a two-terminal quantum dot device under influence of symmetric bias and circularly polarized light. It is found that combination light applied can result in net charge current. The resultant current large enough to be measured when properly choosing system parameters. used deduce due fact there exists simple linear relation between them. When external circuit open, instead induced, which also measurable by present technologies. These findings...
Two-dimensional (2D) materials with intrinsic half-metallicity at or above room temperature are important in spin nanodevices. Nevertheless, such 2D experiment still rarely realized. In this work, a new family of Cr2TeX2 (X = I, Br, Cl) monolayers has been predicted using first-principles calculations. The monolayer is made five atomic sublayers ABCAB-type stacking along the perpendicular direction. It found that energies for all ferromagnetic (FM) half-metallic states lowest. phonon...
The Keldysh Green's function method is employed to study spin-dependent electron transport through a Rashba ring with quantum dot (QD) embedded in one of its arms. Zero charge bias applied on the system while rotating magnetic field considered QD pump pure spin current. spin-orbital coupling (RSOC) can cause precession phase passing ring, so that interference lead spin-polarized current flowing leads and arm without QD, whereas only other QD. It shown for low frequency ω field, pumped...
We theoretically predict the appearance of a persistent charge current in Rashba ring with normal and ferromagnetic lead under no external bias. This is result breaking time inversion symmetry original pure spin induced by spin-orbit coupling (RSOC) due to existence lead. With Keldysh Green's function technique, we find that not only magnitude sign but also polarization generated determined system parameters such as magnetization direction lead, tunneling coefficient, strength RSOC exchange...
Non-equilibrium Green’s function method is applied to study the spin thermoelectric effects in a four-quantum-dot ring with two of quantum dots magnetized. The influence magnetic configuration on transport through system investigated. In some configurations, significant Seebeck coefficient [Formula: see text] can be generated variation dot (QD) energy level. Appropriately tuning QD level let present device work as pure spin-up (spin-down) or pure-spin-current thermal generator. combined...
The electron transport through a Rashba ring with magnetic flux and driven by temperature difference is investigated. It found that the spin interference effect induced spin-orbit interaction can break balance between spin-up spin-down component currents in thermally charge current thus result current. analytical derivation numerical calculations reveal magnitude, sign, peaks spin-polarization of generated be readily modulated system parameters. In particular, some choices parameters,...
By means of the Keldysh Green's function method, we investigate spin-polarized electron transport in a three-terminal device, which is composed three normal metal leads and two serially-coupled quantum dots (QDs). The Rashba spin-orbit interaction (RSOI) also considered one QDs. We show that charge current with arbitrary spin polarization can be obtained because interference effect arising from precession phase, it modulated by system parameters such as applied external voltages, RSOI...