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Relevant bibliographies by topics / Rashba spin-orbit couplings

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Academic literature on the topic 'Rashba spin-orbit couplings'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Rashba spin-orbit couplings"

1

Prabhakar, Sanjay, and Roderick Melnik. "Tuning g-factor of electrons through spin–orbit coupling in GaAs/AlGaAs conical quantum dots." International Journal of Modern Physics B 30, no. 13 (2016): 1642003. http://dx.doi.org/10.1142/s0217979216420030.

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We investigate band structures of [Formula: see text] three-dimensional conical quantum dots (QDs). In particular, we explore the influence of the Rashba and Dresselhaus spin–orbit couplings in the variation of effective [Formula: see text]-factor of electrons in such QDs. We demonstrate that the interplay between the Rashba and Dresselhaus spin–orbit couplings can provide further insight into underlying physical phenomena and assist in the design of quantum logic gates for the application in spintronic devices.

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2

Eryzhenkov, Alexander V., Artem V. Tarasov, Alexander M. Shikin, and Artem G. Rybkin. "Non-Trivial Band Topology Criteria for Magneto-Spin–Orbit Graphene." Symmetry 15, no. 2 (2023): 516. http://dx.doi.org/10.3390/sym15020516.

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Band structure and topology of magneto-spin–orbit graphene is investigated using the proposed tight-binding model that incorporates both Rashba and sublattice-resolved collinear exchange couplings in a generic ferrimagnetic (FIM) setting for in-plane and out-of-plane magnetization directions. The resulting band structures were analyzed for possibilities to extract the strengths of exchange and Rashba couplings from experimental spin-resolved ARPES measurements of the valley gaps and π-state spin-splittings. It was shown that the topologically trivial in-plane FIM situation admits simple expressions for these quantities, whereas the out-of-plane FIM, which admits a nontrivial band topology, is harder to analyze. The obtained topological phase diagrams for the out-of-plane FIM case show that the anomalous Hall conductance is quite stable with respect to the antiferromagnetic (AFM) interaction, which tends to interfere with the QAHE phase; moreover, the topological phase transition has a rather smooth character with respect to the AFM coupling strength.

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3

Dell’Anna, Luca, and Stefano Grava. "Critical Temperature in the BCS-BEC Crossover with Spin-Orbit Coupling." Condensed Matter 6, no. 2 (2021): 16. http://dx.doi.org/10.3390/condmat6020016.

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We review the study of the superfluid phase transition in a system of fermions whose interaction can be tuned continuously along the crossover from Bardeen–Cooper–Schrieffer (BCS) superconducting phase to a Bose–Einstein condensate (BEC), also in the presence of a spin–orbit coupling. Below a critical temperature the system is characterized by an order parameter. Generally a mean field approximation cannot reproduce the correct behavior of the critical temperature Tc over the whole crossover. We analyze the crucial role of quantum fluctuations beyond the mean-field approach useful to find Tc along the crossover in the presence of a spin–orbit coupling, within a path integral approach. A formal and detailed derivation for the set of equations useful to derive Tc is performed in the presence of Rashba, Dresselhaus and Zeeman couplings. In particular in the case of only Rashba coupling, for which the spin–orbit effects are more relevant, the two-body bound state exists for any value of the interaction, namely in the full crossover. As a result the effective masses of the emerging bosonic excitations are finite also in the BCS regime.

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4

Guo, Xiaoyong, Xiaobin Ren, Guangjie Guo, and Jie Peng. "Quantum anomalous Hall effect on a square lattice with spin–orbit couplings and an exchange field." Canadian Journal of Physics 92, no. 5 (2014): 420–24. http://dx.doi.org/10.1139/cjp-2013-0241.

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We investigate a tight-binding model on a two-dimensional square lattice with three terms: the Rashba spin–orbit coupling, the real amplitude next-nearest spin–orbit coupling, and an exchange field. We calculate the first Chern number to identify band topology. It is found that the Chern number takes the quantized values of C1 = 1, 2 and the chiral edge modes can be obtained. Therefore our model realizes the quantum anomalous Hall (QAH) effect. The Rashba coupling is positive for the QAH phase while the next-nearest coupling is detrimental to it. By increasing the exchange field intensity, the Chern number changes from quantized value 2 to 0. The behavior of the edge states is also studied. Particularly for C1 = 2 case, there are two gapless spin-polarized edge states with the same spin polarization moving in the same spatial direction. This indicates that their appearance is topological rather than accidental.

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5

Gong, S. J., and Z. Q. Yang. "Flying spin-qubit gates implemented through Dresselhaus and Rashba spin–orbit couplings." Physics Letters A 367, no. 4-5 (2007): 369–72. http://dx.doi.org/10.1016/j.physleta.2007.03.022.

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6

Liu, Mengnan, Liping Xu, Yong Wan, and Xu Yan. "Effects of Rashba and Dresselhaus spin-orbit couplings on itinerant ferromagnetism." Solid State Communications 270 (February 2018): 50–53. http://dx.doi.org/10.1016/j.ssc.2017.11.009.

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7

Vartanian, Arshak, Albert Kirakosyan, and Karen Vardanyan. "Fröhlich polaron in nanowire with Rashba and Dresselhaus spin-orbit couplings." Superlattices and Microstructures 109 (September 2017): 655–61. http://dx.doi.org/10.1016/j.spmi.2017.05.057.

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8

Imura, Ken-Ichiro, Yoshio Kuramoto, and Kentaro Nomura. "Weak localization properties of graphene with intrinsic and Rashba spin-orbit couplings." Physics Procedia 3, no. 2 (2010): 1249–54. http://dx.doi.org/10.1016/j.phpro.2010.01.171.

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9

You, Jia-Bin, Xiao-Qiang Shao, Qing-Jun Tong, A. H. Chan, C. H. Oh, and Vlatko Vedral. "Majorana transport in superconducting nanowire with Rashba and Dresselhaus spin–orbit couplings." Journal of Physics: Condensed Matter 27, no. 22 (2015): 225302. http://dx.doi.org/10.1088/0953-8984/27/22/225302.

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10

Vartanian, A. L., A. L. Asatryan, A. G. Stepanyan, K. A. Vardanyan, and A. A. Kirakosyan. "Effect of spin–orbit coupling on the hot-electron energy relaxation in nanowires." International Journal of Modern Physics B 34, no. 32 (2020): 2050322. http://dx.doi.org/10.1142/s0217979220503221.

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The energy relaxation of hot electrons is proposed based on the spin–orbit (SO) interaction of both Rashba and Dresselhaus types with the effect of hot phonons. A continuum theory of optical phonons in nanowires taking into account the influence of confinement is used to study the hot-electron energy relaxation. The energy relaxation due to both confined (CO) and interface (IO) optical phonon emission on nanowire radius, electrical field strength, parameters of SO couplings and electron temperature is calculated. For considered values of the nanowire radius as well as other system parameters, scattering by IO phonons prevails over scattering by CO phonons. The presence of an electric field leads to the decrease of power loss in transitions between states with the same spin quantum numbers. With the increase of the electric field strength, the influence of the Dresselhaus SO interaction on the energy relaxation rate decreases. The effect of SO interaction does not change the previously obtained increasing dependence of power loss on electron temperature. The sensitivity of energy relaxation to the electric field also through the Rashba parameter allows controlling the rate of energy by electric field.

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