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|Title: ||Chern band insulators in a magnetic field|
|Authors: ||Araújo, Miguel|
|Keywords: ||número de Chern|
efeito de Hall quântico
espectro de Hofstadter
estados de superfície
|Issue Date: ||29-Jan-2014|
|Publisher: ||Journal of Physics: Condensed Matter|
|Citation: ||Journal of Physics: Condensed Matter 26, 075501 (2014)|
|Abstract: ||The effect of a magnetic field on a two-dimensional Chern band insulator is discussed. It is shown that, unlike the trivial insulator, an anomalous Hall insulator with Chern number C
becomes a metal when a magnetic field is applied at constant particle density, for any C >0.
For a timereversal invariant topological insulator with a spin Chern resolved number,
C_up=-C_down=C, the magnetic field induces a spin polarized spin Hall insulator. We consider also the effect of a superlattice potential and extend previous results for the quantization of the Hall conductance of filled Hofstadter bands to this problem.|
|Appears in Collections:||FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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