TY - JOUR
T1 - Quantum anomalous hall effect with higher plateaus
AU - Wang, Jing
AU - Lian, Biao
AU - Zhang, Haijun
AU - Xu, Yong
AU - Zhang, Shou Cheng
PY - 2013/9/24
Y1 - 2013/9/24
N2 - The quantum anomalous Hall (QAH) effect in magnetic topological insulators is driven by the combination of spontaneous magnetic moments and spin-orbit coupling. Its recent experimental discovery raises the question if higher plateaus can also be realized. Here, we present a general theory for a QAH effect with higher Chern numbers and show by first-principles calculations that a thin film magnetic topological insulator of Cr-doped Bi2(Se,Te) 3 is a candidate for the C=2 QAH insulator. Remarkably, whereas a higher magnetic field leads to lower Hall conductance plateaus in the integer quantum Hall effect, a higher magnetic moment leads to higher Hall conductance plateaus in the QAH effect.
AB - The quantum anomalous Hall (QAH) effect in magnetic topological insulators is driven by the combination of spontaneous magnetic moments and spin-orbit coupling. Its recent experimental discovery raises the question if higher plateaus can also be realized. Here, we present a general theory for a QAH effect with higher Chern numbers and show by first-principles calculations that a thin film magnetic topological insulator of Cr-doped Bi2(Se,Te) 3 is a candidate for the C=2 QAH insulator. Remarkably, whereas a higher magnetic field leads to lower Hall conductance plateaus in the integer quantum Hall effect, a higher magnetic moment leads to higher Hall conductance plateaus in the QAH effect.
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U2 - 10.1103/PhysRevLett.111.136801
DO - 10.1103/PhysRevLett.111.136801
M3 - Article
C2 - 24116800
AN - SCOPUS:84884680564
SN - 0031-9007
VL - 111
JO - Physical review letters
JF - Physical review letters
IS - 13
M1 - 136801
ER -