Dresselhaus Spin Orbit Coupling
- Internet Archive Search: creator:"ming-hao liu".
- Spin-polarization in quantum wires: Influence of Dresselhaus spin-orbit.
- Dresselhaus spin-orbit effect on traversal time in... - NASA/ADS.
- Skyrmions in chiral magnets with Rashba and Dresselhaus spin-orbit coupling.
- (PDF) Optical transitions in a quantum wire with spin-orbit interaction.
- Condensed matter - Why is the Dresselhaus type spin orbit coupling.
- Rashba and Dresselhaus spin-orbit coupling effects on tunnelling.
- [1901.00362] Dresselhaus spin-orbit coupling in [111]-oriented.
- Prediction of low-Z collinear and noncollinear... - NASA/ADS.
- Two-dimensional Fröhlich polaron with Rashba and Dresselhaus spin-orbit.
- Dresselhaus spin-orbit coupling in [111]-oriented semiconductor nanowires.
- PDF Lecture I: Synthetic Spin-Orbit Coupling for Ultracold Atoms and.
- Spin-orbit coupling in cold atoms | Department of Physics | UMass Amherst.
- Ubiquitous Spin-Orbit Coupling in a Screw Dislocation with High Spin.
Internet Archive Search: creator:"ming-hao liu".
Taking into consideration the Dresselhaus spin-orbit interaction, we study theoretically the transmission coefficients and the traversal time of electrons tunneling through Fe/GaSb/Fe and Fe/InSb/Fe heterostructures. There is a common characteristic for the two different structures, i.e., the transmission coefficients, whether for spin-up spin-down electrons, show obvious resonant features. The over 60 years old Rashba-Dresselhaus effect predicts spin-orbit coupling (SOC) induced momentum-dependent spin splitting and spin polarization in materials with noncentrosymmetric structures. Strong SOC induced effects usually require high-atomic number (Z) elements such as rare-earth elements. It has recently been pointed out [Yuan et al., Phys. Rev. B 102, 014422 (2020), 10.1103/PhysRevB. The high-power conversion efficiency observed for these materials may be related to the degree of spin-orbit coupling (SOC) strength present in their crystal structure.... from heavy Pb atoms in the superlattice gives rise to large Rashba-Dresselhaus SOC, where spin-dependent properties can be manipulated by electric fields. In this.
Spin-polarization in quantum wires: Influence of Dresselhaus spin-orbit.
• Spin-orbit as both advantage and obstacle. • Schliemann, Egues, Loss proposal - The significance of "Rashba=Dresselhaus" • Spin propagation in the presence of spin-orbit coupling. - Theory and experiment • The quest for the Persistent Spin Helix. - Measurement and control over Rashba, Dresselhaus coupling. Dresselhaus, G.. "Spin-Orbit Coupling Effects in Zinc Blende Structures."Physical Review100.2 (1955): 580-586. Rashba, Emmanuel I.. "Theory of electrical spin injection: Tunnel contacts as a solution of the conductivity mismatch problem."Physical Review B62.24 (2000). 1、自旋轨道耦合 (Spin-orbit coupling). We study effects of the oft-neglected cubic Dresselhaus spin-orbit coupling (i.e., directly proportional p3) in GaAs/AlGaAs quantum dots. Using a semiclassical billiard model, we estimate the magnitude of the spin-orbit induced avoided crossings in a closed quantum dot in a Zeeman field.
Dresselhaus spin-orbit effect on traversal time in... - NASA/ADS.
The interfacial effect in nanosystems is crucial for diverse fields of physics. Here we explore in detail the interface associated Dresselhaus spin-orbit (SO) coupling, which comprises the usual linear β ν, u (Γ u) and cubic β ν, 3 (Γ 3) contributions as well as the interface-induced term β ν, int (Γ int) of intrasubband (intersubband) kinds.Focusing on ordinary Al 0.48 In 0.52 As.
Skyrmions in chiral magnets with Rashba and Dresselhaus spin-orbit coupling.
Effect of Rashba and Dresselhaus spin-orbit coupling on supercurrent rectification and magnetochiral anisotropy of ballistic Josephson junctions J Phys Condens Matter. 2022 Jan 20. doi: 10.1088/1361-648X/ac4d5e.... possibly as the result of a finite Dresselhaus component. With spin orbit coupling, exchange may be anisotropic, depending on orientation relative to the crystal axes, and the line joining the spins. In simplest case may have Ising-like... (Dresselhaus coupling) bx = γ kx(ky2-kz2) + cyclic permutations. For a 2DEG in a symmetric confining well, set kz2 = (π/d)2,.
(PDF) Optical transitions in a quantum wire with spin-orbit interaction.
Why is the Dresselhaus type spin orbit coupling represented as next-nearest neighbor hopping? Ask Question Asked 5 years, 4 months ago. Modified 5 years, 4 months ago. Viewed 261 times 0 $\begingroup$ As I have seen it in the Fu-Kane-Mele model context of a bipartite lattice, it is represented as a coupling between second-nearest neighbors. Main article: Dresselhaus effect The Rashba spin-orbit coupling is typical for systems with uniaxial symmetry, e.g., for hexagonal crystals of CdS and CdSe for which it was originally found and perovskites, and also for heterostructures where it develops as a result of a symmetry breaking field in the direction perpendicular to the 2D surface. Cubic Dresselhaus Spin-Orbit Coupling in 2D Electron Quantum Dots Jacob J. Krich and Bertrand I. Halperin Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA (Received 27 February 2007; published 31 May 2007) We study effects of the oft-neglected cubic Dresselhaus spin-orbit coupling (i.e., /p3)in.
Condensed matter - Why is the Dresselhaus type spin orbit coupling.
This theoretical Perspective reviews spin-orbit coupling (SOC), including the Rashba effect and Dresselhaus effect, in two-dimensional (2D) semiconductors. We first introduce the origin of the Rashba effect and Dresselhaus effect using the Hamiltonian models; we then summarize 2D Rashba semiconductors predicted by first-principles density functional theory (DFT) calculations, including AB. While the relativistic spin-orbit coupling (SOC) plays a crucial role in both cases, the intrinsic SHE arises from the intrinsic band structure, whereas the extrinsic one is due to the impurities. The Dresselhaus effect is a phenomenon in solid-state physics in which spin-orbit interaction causes energy bands to split. It is usually present in crystal systems lacking inversion symmetry. The effect is named after , husband of Mildred Dresselhaus, who discovered this splitting in 1955.
Rashba and Dresselhaus spin-orbit coupling effects on tunnelling.
We establish the fundamental physics of a model which can be viewed as the double version of the Rashba and Dresselhaus spin-orbit coupling. This model describes the low energy physics of a class of massless Dirac fermions in spin-orbit systems. The physical properties of the massless Dirac fermions are determined by the mathematical relations.
[1901.00362] Dresselhaus spin-orbit coupling in [111]-oriented.
. We demonstrate momentum-dependent energy splittings and the impact of Dresselhaus spin-orbit coupling on the dispersion relation. In view of possible spintronics applications relying on bulk.
Prediction of low-Z collinear and noncollinear... - NASA/ADS.
Spin Relaxation and Anticrossing in Quantum Dots: Rashba versus Dresselhaus Spin-Orbit Coupling Denis V. Bulaev and Daniel Loss Department of Physics University of Basel, Switzerland. Hamiltonian of electrons in a quantum dot. Three lowest electron energy levels Rashba term as perturbation Dresselhaus term as perturbation Anti-crossing (crossing)of the levelsE2andE3at. Effect of Rashba and Dresselhaus spin-orbit coupling on supercurrent rectification and magnetochiral anisotropy of ballistic Josephson junctions C Baumgartner1, L Fuchs1, A Costa2, Jordi Picó-Cortés2, S Reinhardt1, S Gronin3,4, G C Gardner3,4, T Lindemann4,5, M J Manfra3,4,5,6,7, P E Faria Junior2 Show full author list.
Two-dimensional Fröhlich polaron with Rashba and Dresselhaus spin-orbit.
We present a general model with both Rashba and Dresselhaus spin-orbit couplings to describe a two-dimensional noncentrosymmetric superconductor. The combined effects of the two spin-orbit couplings on superconductivity are investigated in the framework of mean-field theory. We find that the Rashba and Dresselhaus spin-orbit couplings result in similar effects on superconductivity if they are.
Dresselhaus spin-orbit coupling in [111]-oriented semiconductor nanowires.
We investigate the simultaneous effect of Rashba and Dresselhaus spin-orbit interactions on the formation of Fröhlich polarons in two-dimensional semiconductors in weak electron-phonon coupling approximation. The results illustrate that the spin-orbit coupling terms may significantly affect the polaron properties. We show that in the presence of both SO coupling terms the self-energy. InAs has a bulk inversion asymmetry in the microscopic crystal potential which induces the Dresselhaus spin-orbit coupling effect.2 We also assume that there is an external magnetic field of flux density B along ŷ. It has been pointed out3,4 that if the nuclear spins in the quantum wire are polarized by some external means, such as optical. And Dresselhaus spin-orbit couplings. We calculate the condensate fraction in the BCS-BEC (Bardeen-Cooper-Schrieffer-Bose-Einstein condensate) crossover in both two and three dimensions by taking into account singlet and triplet pairings. These quantities are studied by varying the spin-orbit interaction from the case with the.
PDF Lecture I: Synthetic Spin-Orbit Coupling for Ultracold Atoms and.
Abstract: We report a theoretical investigation on Goose-Hänchen (GH) effect for spin electrons across a magnetically confined GaAs/Al x Ga 1-x As microstructure modulated by spin-orbit coupling [(SOC), including Rashba and Dresselhaus types]. An intrinsic symmetry in the device is broken by SOC, which gives rise to a considerable spin polarization effect in GH shifts of electrons. In this talk, I will review recent progress in theoretical understanding of many-particle cold-atom systems with synthetic spin-orbit couplings. First, I will briefly review the known laser schemes that lead to effective Rashba and Dresselhaus-type couplings for dressed states and also introduce a new interesting scheme that gives rise to a.
Spin-orbit coupling in cold atoms | Department of Physics | UMass Amherst.
The contribution of bulk inversion asymmetry to the total spin-orbit coupling is commonly neglected for group III-V nanowires grown in the generic [111] direction. We have solved the complete Hamiltonian of the circular nanowire accounting for bulk inversion asymmetry via exact numerical diagonalization. Three different symmetry classes of angular. Spin-orbit decoupled14 and the intrinsic spin-Hall effect should vanish, we extend our prior studies to include 2DEGs with both Rashba and Dresselhaus spin-orbit coupling. We find that the spin Hall conductivity remainse/8pin the weak scattering mesoscopic limit except for a small window where the spin-orbit coupling strengths are equal and.
Ubiquitous Spin-Orbit Coupling in a Screw Dislocation with High Spin.
RashbaHamiltonian of infinite 1DEG: Kinetic energy + SO coupling 1D Eigenenergies: 1D Eigenstates: The general spin evolution is precession about the y-axis (in the x-z planne) with an angular frequency angular modulation of the spin orientation for a channel of length L (c.f. Datta-Dasspin-FET ).
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