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Title: Quantization of interface currents

At the interface of two two-dimensional quantum systems, there may exist interface currents similar to edge currents in quantum Hall systems. It is proved that these interface currents are macroscopically quantized by an integer that is given by the difference of the Chern numbers of the two systems. It is also argued that at the interface between two time-reversal invariant systems with half-integer spin, one of which is trivial and the other non-trivial, there are dissipationless spin-polarized interface currents.
Authors:
 [1] ;  [2] ;  [3]
  1. AIMR, Tohoku University, Sendai (Japan)
  2. Department Mathematik, Universität Erlangen-Nürnberg, Erlangen (Germany)
  3. Instituto de Matematicas, Cuernavaca, UNAM, Cuernavaca (Mexico)
Publication Date:
OSTI Identifier:
22403059
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Mathematical Physics; Journal Volume: 55; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CURRENTS; INTERFACES; QUANTIZATION; SPIN; SPIN ORIENTATION; TWO-DIMENSIONAL CALCULATIONS