- Modulation instability of two-dimensional Bose-Einstein condensates.
- Double version of the Rashba and Dresselhaus spin-orbit coupling.
- Dresselhaus spin-orbit coupling induced electron-spin polarization in a.
- Majorana corner modes in mesoscopic superconducting square systems with.
- Cubic Dresselhaus spin-orbit coupling in 2D electron quantum dots.
- Collapse of quasi-two-dimensional symmetrized Dresselhaus spin-orbit.
- [2102.00907] Pure Gauge Spin-Orbit Couplings - arX.
- Holonomic quantum computation with electron spins in quantum dots.
- Measurement of the Dresselhaus and Rashba Spin-Orbit Coupling Via Weak.
- PDF Cubic Dresselhaus Spin-Orbit Coupling in 2D Electron Quantum Dots.
- The effect of k-cubic Dresselhaus spin—orbit coupling on the decay time.
- Realistic Rashba and Dresselhaus spin-orbit coupling for neutral atoms.
- 40970 PDFs | Review articles in SPIN-ORBIT COUPLING.
Modulation instability of two-dimensional Bose-Einstein condensates.
2 Answers Sorted by: 1 The Dresselhaus spin-splitting arises from the lack of inversion symmetry in the material itself. That is, the crystal lacks this symmetry operation (a reflection symmetry) and therefore so does the reciprocal lattice.
Double version of the Rashba and Dresselhaus spin-orbit coupling.
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.
Dresselhaus spin-orbit coupling induced electron-spin polarization in a.
The Rashba and Dresselhaus types of spin-orbit coupling are two typical linear coupling forms. 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. We report a theoretical exploration on the control of the Dresselhaus －spin-orbit －coupling (SOC) induced spin polarization via the δ-doping for electrons in the 3-layered semiconductor heterostructure (3-LSH). It is shown that an obvious electron-spin polarization effect still exists when a δ-doping is introduced inside. Moreover, both. Understand spin-orbit (SO) coupling. In technologically important III-V semiconductor heterostructures, spin-orbit coupling originates in the asymmetry of the confining potential (called the Rashba term), which can be controlled by gates, and in bulk inversion asymmetry of the crystal lattice (called the Dresselhaus term). In quasi-2D systems,.
Majorana corner modes in mesoscopic superconducting square systems with.
Abstract. In this work, we investigate the possible dramatic effects of Rashba or Dresselhaus spin-orbit coupling (SOC) on the fermionic Hubbard model in a two-dimensional square lattice. In the strong coupling limit, it leads to the rotated antiferromagnetic Heisenberg model which is a new class of quantum spin model. We are therefore able to measure the spin relaxation time due to the spin-orbit interaction over a wide range of carrier density (3-12× 1011 cm-2) with a negligible Rashba coupling. We show that the spin-orbit mechanism is dominated by the first harmonic of the Dresselhaus term whereas the third harmonic remains weak due to the dominant.
Cubic Dresselhaus spin-orbit coupling in 2D electron quantum dots.
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 inversion asymmetry we calculate the spin expectation values and the spin texture as a function of the Fermi energy. 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.
Collapse of quasi-two-dimensional symmetrized Dresselhaus spin-orbit.
Spin transport differs from charge transport in that spin is a nonconserved quantity in solids due to spin-orbit and hyperfine coupling. The authors discuss in detail spin decoherence mechanisms. 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. Superconducting systems with spin-orbit (SO) coupling have attracted a great deal of attention in recent years. There are two typical types of SO interactions: the Rashba [1, 2] and Dresselhaus [3, 4] couplings.The former is related to the lack of microscopic structural inversion symmetry, and the latter is originated from the bulk inversion asymmetry in crystalline structures and the.
[2102.00907] Pure Gauge Spin-Orbit Couplings - arX.
Coupling, rst reported by Dresselhaus. 1 Dresselhaus spin-orbit splitting 1.1 Introduction For small values of k, the 6 conduction band in semiconductors lacking an inversion symmetry is split due. In recent pioneer experiment, a strong spin-orbit coupling, with equal Rashba and Dresselhaus strengths, has been created in a trapped Bose-Einstein condensate. Moreover, many exotic superfluid.
Holonomic quantum computation with electron spins in quantum dots.
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.
Measurement of the Dresselhaus and Rashba Spin-Orbit Coupling Via Weak.
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 Gene Dresselhaus, husband of Mildred Dresselhaus, who discovered this splitting in 1955. In the presence of Rashba-Dresselhaus coupling, strong spin-orbit interactions in liquid crystal optical cavities result in a distinctive spin-split entangled dispersion. Spin coherence between such modes give rise to an optical persistent-spin-helix. In this letter, we introduce optical gain in such a system, by dispersing a molecular dye in a liquid-crystal microcavity. We demonstrate both.
PDF Cubic Dresselhaus Spin-Orbit Coupling in 2D Electron Quantum Dots.
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The effect of k-cubic Dresselhaus spin—orbit coupling on the decay time.
Effect of Rashba and Dresselhaus spin-orbit coupling on supercurrent rectification and magnetochiral anisotropy of ballistic Josephson junctions Simultaneous breaking of inversion- and time-reversal symmetry in Josephson junction leads to a possible violation of the I(ϕ) = -I(-ϕ) equality for the current-phase relation. Here, we study the collapse process of quasi-two-dimensional Bose-Einstein condensate with symmetrized Dresselhaus spin-orbit coupling. We show that at a sufficiently strong spin-orbit coupling the arising spin-dependent velocity compensates the attraction between particles and can prevent the collapse of the condensate. As a result, spin-orbit coupling can lead to a stable condensate.
Realistic Rashba and Dresselhaus spin-orbit coupling for neutral atoms.
Spin-orbit coupling effects on thermoelectric transport properties in quantum dots Abstract 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. FERMI GASES WITH SYNTHETIC SPIN-ORBIT COUPLING. Volume 2, 2014. Xia-ji Liu. Jing Zhang. Han Pu. Hui Hu. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Download Download PDF.
40970 PDFs | Review articles in SPIN-ORBIT COUPLING.
Planar systems with a general linear spin-orbit interaction (SOI) that can be cast in the form of a non-Abelian pure gauge field are investigated using the language of non-Abelian gauge field theory. A special class of these fields that, though a $2\\times2$ matrix, are Abelian are seen to emerge and their general form is given. It is shown that the unitary transformation that gauges away.
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