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Title: Spin- and valley-dependent commensurability oscillations and electric-field-induced quantum Hall plateaux in periodically modulated silicene

We study the commensurability oscillations in silicene subject to a perpendicular electric field E{sub z}, a weak magnetic field B, and a weak periodic potential V=V{sub 0}cos(Cy),C=2π/a{sub 0} with a{sub 0} its period. The field E{sub z} and/or the modulation lift the spin degeneracy of the Landau levels and lead to spin and valley resolved Weiss oscillations. The spin resolution is maximal when the field E{sub z} is replaced by a periodic one E{sub z}=E{sub 0}cos(Dy),D=2π/b{sub 0}, while the valley one is maximal for b{sub 0} = a{sub 0}. In certain ranges of B values, the current is fully spin or valley polarized. Additional quantum Hall conductivity plateaux arise due to spin and valley intra-Landau-level transitions.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen (Belgium)
  2. Department of Physics, Concordia University, 7141 Sherbrooke Ouest Montréal, Québec H4B 1R6 (Canada)
  3. Instituto de Fisica de São Carlos, Universidade de São Paulo, São Carlos, SP 13560-970 (Brazil)
Publication Date:
OSTI Identifier:
22300137
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 21; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC FIELDS; ENERGY-LEVEL TRANSITIONS; HALL EFFECT; MAGNETIC FIELDS; MODULATION; OSCILLATIONS; PERIODICITY; RESOLUTION; SILICON COMPOUNDS; SPIN