- Chern insulator in a ferromagnetic two-dimensional electron system with.
- What is the difference between Rashba spin-orbit coupling and.
- PDF Generalized Rashba-Dresselhaus spin-orbit coupling for cold atoms.
- Spin Hall and spin-diagonal conductivity in the presence of Rashba and.
- Dresselhaus effect - Wikipedia.
- About: Dresselhaus effect.
- Realistic Rashba and Dresselhaus spin-orbit coupling for.
- Rashba and Dresselhaus Couplings in Halide Perovskites: Accomplishments.
- Interface involved Dresselhaus spin-orbit coupling in GaInAs/AlInAs.
- Effect of Rashba and Dresselhaus spin-orbit coupling on.
- Manipulating polariton condensates by Rashba-Dresselhaus.
- Prediction of low-Z collinear and noncollinear... - NASA/ADS.
- Condensed matter - Why is the Dresselhaus type spin orbit coupling.
- Organic-to-inorganic structural chirality transfer in a 2D... - Europe PMC.
Chern insulator in a ferromagnetic two-dimensional electron system with.
Spin-orbit coupling (SOC) describes a relativistic effect, relevant especially for heavy atoms. Pb-based HOIPs are gaining substantial interest in spintronics owing to a strong SOC induced by the.
What is the difference between Rashba spin-orbit coupling and.
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 ). In a special situation when the strength of Rashba and Dresselhaus spin-orbit coupling are tuned to be equal, SU(2) symmetry is recovered and a persistent spin helix state is found 23,24,25. This state is robust against any spin-independent scattering. However it will be potentially destroyed by the cubic Dresselhaus term which is usually tuned. Gene is best known for his seminal contribution on spin-orbit coupling in crystals, known later as the Dresselhaus effect. He based his analysis on the effective mass theory for explaining the cyclotron resonance in semiconductors. His work on the spin-orbit interactions that occur in the absence of an inversion center made Gene a go-to.
PDF Generalized Rashba-Dresselhaus spin-orbit coupling for cold atoms.
The scattering time and the relative strength of Rashba and linear Dresselhaus SOI's based on these modes and optical grating experiments. We discuss the physical interpretation of each of these modes in the context of Rabi... in the strong spin-orbit coupling regime, there is only one mode observed in the uniform spin-polarized case.11,12.
Spin Hall and spin-diagonal conductivity in the presence of Rashba and.
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. 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 effect - Wikipedia.
Spin-orbit coupling makes the spin degree of freedom respond to its orbital environment. In solids this yields such fascinating phenomena as a spin split-... It was first emphasized by Elliot [3] and by Dresselhaus et al. [4]that the Pauli SO coupling (1.1) may have important consequences for the one-electron energy levels in bulk. The strong spin−orbit coupling effect from heavy elements (e.g., Pb, Sn, I, and Br) and inversion symmetry breaking owing to the polar distortion (e.g., aligned molecular dipoles in OMHPs) give rise to the Rashba effect, which lifts the two-fold degeneracy of bands near the band gap. This is distinct from the Dresselhaus effect, which. We propose a Chern insulator in a two-dimensional electron system with Dresselhaus spin-orbit coupling, ferromagnetism, and spin-dependent effective mass. The analytically-obtained topological phase diagrams show the topological phase transitions induced by tuning the magnetization orientation with the Chern number varying between 1, 0, −1.
About: Dresselhaus effect.
Corpus ID: 237513698; Lasing in the Rashba-Dresselhaus spin-orbit coupling regime in a dye-filled liquid crystal optical microcavity @inproceedings{Muszynski2021LasingIT, title={Lasing in the Rashba-Dresselhaus spin-orbit coupling regime in a dye-filled liquid crystal optical microcavity}, author={M. Muszy'nski and Mateusz Kr'ol and Katarzyna Rechci'nska and Przemysław Oliwa and Mateusz.
Realistic Rashba and Dresselhaus spin-orbit coupling for.
We study the effects caused by Rashba and Dresselhaus spin-orbit coupling over the thermoelectric transport properties of a single-electron transistor, viz., a quantum dot connected to one-dimensional leads. Using linear response theory and employing the numerical renormalization group method, we calculate the thermopower, electrical and thermal. 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. Comparison with Dresselhaus spin–orbit coupling 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 [20] and perovskites, and also for heterostructures where it develops as a result of a symmetry breaking.
Rashba and Dresselhaus Couplings in Halide Perovskites: Accomplishments.
Semiconductor information-processing devices are among the most sophisticated, complex high-performance structures. As the construction cost of a new fabrication line approaches $3.5 billion, and 25 % of its tools are obsolete and need replacement every three years, it is reasonable to question the appeal of alternate methods of information processing. These schemes use N cyclically coupled ground or metastable internal states. We focus on two situations: a three-level case and a four-level case, where the latter adds a controllable Dresselhaus. The spin-orbit coupling describes the interaction between the spin and orbital degrees of freedom of a particle 1, 2. It leads to a plethora of physical phenomena such as the spin Hall effect 1, 3, 4 and topological insulators 5 - 7. Dresselhaus 8 and Rashba 9 proposed electronic spin-orbit coupling in noncentrosymmetric zinc-blende or.
Interface involved Dresselhaus spin-orbit coupling in GaInAs/AlInAs.
They have the lowest energy and are separated from the remaining eigenstates by a gap determined by the Rabi frequencies of the atom-light coupling. Adiabatically eliminating the excited states, the resulting Hamiltonian of the remaining two internal states in- cludes either Rashba or Dresselhaus spin-orbit (SO) coupling. GaAs: strong spin-orbit coupling; strong hyperfine interaction (Extrinsic) Spin-Hall Effect Spin Hall Effect: the regular current (J) drives a spin... Dresselhaus, G. Dresselhaus, and A. Jorio, Group Theory: Applications to the Physics of Condensed Matter, Springer 2008. Title.
Effect of Rashba and Dresselhaus spin-orbit coupling on.
Spin Relaxation and Anticrossing in Quantum Dots: Rashba versus Dresselhaus Spin-Orbit Coupling - The spin-orbit splitting of the electron levels in a two-dimensional quantum dot... of a magnetic field exhibits a cusp-like structure for Rashba but not for.
Manipulating polariton condensates by Rashba-Dresselhaus.
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,. Abstract. We describe a new class of atom-laser coupling schemes which lead to spin-orbit-coupled Hamiltonians for ultracold neutral atoms. By properly setting the optical phases, a pair of degenerate pseudospin (a linear combination of internal atomic) states emerge as the lowest-energy eigenstates in the spectrum and are thus immune to collisionally induced decay.
Prediction of low-Z collinear and noncollinear... - NASA/ADS.
Therefore the spin-orbit-interaction can indeed be viewed as analogous to a Zeeman splitting in an effective magnetic field, except that in the present case, there is no time reversal symmetry. Inversion symmetry may also be broken by an electric field $\mathbf{E}$, giving rise to the Bychkov-Rashba SOI.
Condensed matter - Why is the Dresselhaus type spin orbit coupling.
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.
Organic-to-inorganic structural chirality transfer in a 2D... - Europe PMC.
The spin-orbit coupling Eq. ( II.3.6 ), leads to a spin-splitting for electrons moving in solids (e.g., semiconductors) even in absence of any magnetic field. Symmetries of the crystal lattice then play a role (Dresselhaus effect), and in artificial heterostructures or quantum wells, an internal electric field can give rise to a coupling to the. Here, we simulate spin-orbit interactions in a tunable, liquid crystal (LC)-filled, optical cavity. By controlling the refractive index anisotropy of the intracavity layer, we adiabatically engineer the coupling between optical modes and show that the system is described by a Hamiltonian with Dresselhaus and Bychkov-Rashba (3, 4) terms, originally used to describe fermions.
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