Reference : Spin-orbit coupling in quasi-one-dimensional Wigner crystals
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/30749
Spin-orbit coupling in quasi-one-dimensional Wigner crystals
English
Kornich, Viktoriia mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit > > Materials Science Research Unit > > ; University of Wisconsin-Madison > Condensed Matter Physics]
Pedder, Christopher mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Schmidt, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
17-Jan-2017
Physical Review B
American Physical Society
95
4
045413
Yes (verified by ORBilu)
International
2469-9950
2469-9969
New York
United States
[en] Rashba spin-orbit coupling ; Nanowires ; Wigner crystal
[en] We study the effect of Rashba spin-orbit coupling (SOC) on the charge and spin degrees of freedom of a quasi-one-dimensional (quasi-1D) Wigner crystal. As electrons in a quasi-1D Wigner crystal can move in the transverse direction, SOC cannot be gauged away in contrast to the pure 1D case. We show that for weak SOC, a partial gap in the spectrum opens at certain ratios between density of electrons and the inverse Rashba length. We present how the low-energy branch of charge degrees of freedom deviates due to SOC from its usual linear dependence at small wave vectors. In the case of strong SOC, we show that spin sector of a Wigner crystal cannot be described by an isotropic antiferromagnetic Heisenberg Hamiltonian any more, and that instead the ground state of neighboring electrons is mostly a triplet state. We present a new spin sector Hamiltonian and discuss the spectrum of Wigner crystal in this limit.
Fonds National de la Recherche - FnR
Researchers
http://hdl.handle.net/10993/30749
10.1103/PhysRevB.95.045413
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.045413
FnR

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