TY - JOUR
T1 - Quantization of interface currents
AU - Kotani, Motoko
AU - Schulz-Baldes, Hermann
AU - Villegas-Blas, Carlos
N1 - Publisher Copyright:
© 2014 AIP Publishing LLC.
PY - 2014/12/18
Y1 - 2014/12/18
N2 - 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.
AB - 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.
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U2 - 10.1063/1.4902377
DO - 10.1063/1.4902377
M3 - Article
AN - SCOPUS:84919686155
SN - 0022-2488
VL - 55
JO - Journal of Mathematical Physics
JF - Journal of Mathematical Physics
IS - 12
M1 - 121901
ER -