scholarly journals Observation of optical absorption correlated with surface state of topological insulator

2019 ◽  
Vol 100 (19) ◽  
Author(s):  
Jiwon Jeon ◽  
Kwangnam Yu ◽  
Jiho Kim ◽  
Jisoo Moon ◽  
Seongshik Oh ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Topological Insulator ◽  
Surface State

scholarly journals Enhanced surface state protection and band gap in the topological insulator PbBi4Te4S3

2018 ◽  
Vol 2 (10) ◽  
Author(s):  
K. Sumida ◽  
T. Natsumeda ◽  
K. Miyamoto ◽  
I. V. Silkin ◽  
K. Kuroda ◽  
...  
Keyword(s):  
Band Gap ◽  
Topological Insulator ◽  
Surface State ◽  
Enhanced Surface ◽  
State Protection

scholarly journals Termination switching of antiferromagnetic proximity effect in topological insulator

2020 ◽  
Vol 6 (33) ◽  
pp. eaaz8463
Author(s):  
Chao-Yao Yang ◽  
Lei Pan ◽  
Alexander J. Grutter ◽  
Haiying Wang ◽  
Xiaoyu Che ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Topological Insulator ◽  
Surface State ◽  
Proximity Effect ◽  
Surface States ◽  
Double Exchange ◽  
Exchange Interactions ◽  
Stacking Order ◽  
Bst Films ◽  
Magnetic Proximity Effect

This work reports the ferromagnetism of topological insulator, (Bi,Sb)2Te3 (BST), with a Curie temperature of approximately 120 K induced by magnetic proximity effect (MPE) of an antiferromagnetic CrSe. The MPE was shown to be highly dependent on the stacking order of the heterostructure, as well as the interface symmetry: Growing CrSe on top of BST results in induced ferromagnetism, while growing BST on CrSe yielded no evidence of an MPE. Cr-termination in the former case leads to double-exchange interactions between Cr3+ surface states and Cr2+ bulk states. This Cr3+-Cr2+ exchange stabilizes the ferromagnetic order localized at the interface and magnetically polarizes the BST Sb band. In contrast, Se-termination at the CrSe/BST interface yields no detectable MPE. These results directly confirm the MPE in BST films and provide critical insights into the sensitivity of the surface state.

Surface state dominated transport in topological insulator Bi2Te3 nanowires

2013 ◽  
Vol 103 (19) ◽  
pp. 193107 ◽  
Author(s):  
Bacel Hamdou ◽  
Johannes Gooth ◽  
August Dorn ◽  
Eckhard Pippel ◽  
Kornelius Nielsch
Keyword(s):  
Topological Insulator ◽  
Surface State

Summary Abstract: Surface state optical absorption on the clean Si(100)2×1 surface

1983 ◽  
Vol 1 (2) ◽  
pp. 1241-1242 ◽  
Author(s):  
Y. J. Chabal ◽  
S. B. Christman ◽  
E. E. Chaban ◽  
M. T. Yin
Keyword(s):  
Optical Absorption ◽  
Surface State

scholarly journals Mirror-symmetry protected non-TRIM surface state in the weak topological insulator Bi2TeI

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
I. P. Rusinov ◽  
T. V. Menshchikova ◽  
A. Isaeva ◽  
S. V. Eremeev ◽  
Yu. M. Koroteev ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Surface State ◽  
Mirror Symmetry ◽  
Symmetry Protected
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