Landau quantization of topological surface states in Bi2Se3.
We report the direct observation of Landau quantization in Bi2Se3 thin films by using a low-temperature scanning tunneling microscope. In particular, we discovered the zeroth Landau level, which is predicted to give rise to the half-quantized Hall effect for the topological surface states. The existence of the discrete Landau levels (LLs) and the suppression of LLs by surface impurities strongly support the 2D nature of the topological states. These observations may eventually lead to the realization of quantum Hall effect in topological insulators.
Cheng
Peng
P
Department of Physics, Tsinghua University, Beijing 100084, China.
Song
Canli
C
Zhang
Tong
T
Zhang
Yanyi
Y
Wang
Yilin
Y
Jia
Jin-Feng
JF
Wang
Jing
J
Wang
Yayu
Y
Zhu
Bang-Fen
BF
Chen
Xi
X
Ma
Xucun
X
He
Ke
K
Wang
Lili
L
Dai
Xi
X
Fang
Zhong
Z
Xie
Xincheng
X
Qi
Xiao-Liang
XL
Liu
Chao-Xing
CX
Zhang
Shou-Cheng
SC
Xue
Qi-Kun
QK