scholarly journals The impact of metallic contacts on spin-polarized photocurrents in topological insulator Bi 2 Se 3 nanowires

2020 ◽  
Vol 117 (26) ◽  
pp. 262401
Author(s):  
N. Meyer ◽  
K. Geishendorf ◽  
J. Walowski ◽  
A. Thomas ◽  
M. Münzenberg
Keyword(s):  
Topological Insulator ◽  
Metallic Contacts ◽  
Spin Polarized ◽  
The Impact

scholarly journals Many-impurity scattering on the surface of a topological insulator

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
José Luis Hernando ◽  
Yuriko Baba ◽  
Elena Díaz ◽  
Francisco Domínguez-Adame
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Topological Insulator ◽  
Disordered Systems ◽  
Spectral Properties ◽  
Random Distribution ◽  
Surface States ◽  
Impurity Scattering ◽  
Self Consistent ◽  
The Impact

AbstractWe theoretically address the impact of a random distribution of non-magnetic impurities on the electron states formed at the surface of a topological insulator. The interaction of electrons with the impurities is accounted for by a separable pseudo-potential method that allows us to obtain closed expressions for the density of states. Spectral properties of surface states are assessed by means of the Green’s function averaged over disorder realisations. For comparison purposes, the configurationally averaged Green’s function is calculated by means of two different self-consistent methods, namely the self-consistent Born approximation (SCBA) and the coherent potential approximation (CPA). The latter is often regarded as the best single-site theory for the study of the spectral properties of disordered systems. However, although a large number of works employ the SCBA for the analysis of many-impurity scattering on the surface of a topological insulator, CPA studies of the same problem are scarce in the literature. In this work, we find that the SCBA overestimates the impact of the random distribution of impurities on the spectral properties of surface states compared to the CPA predictions. The difference is more pronounced when increasing the magnitude of the disorder.

scholarly journals Spin-polarized STM spectra of Dirac electrons on the surface of a topological insulator

2011 ◽  
Vol 84 (16) ◽  
Author(s):  
K. Saha ◽  
Sourin Das ◽  
K. Sengupta ◽  
Diptiman Sen
Keyword(s):  
Topological Insulator ◽  
Spin Polarized

scholarly journals Electrical detection of spin-polarized current in topological insulator Bi1.5Sb0.5Te1.7Se1.3

2019 ◽  
Vol 19 (8) ◽  
pp. 917-923 ◽  
Author(s):  
Tae-Ha Hwang ◽  
Hong-Seok Kim ◽  
Hoil Kim ◽  
Jun Sung Kim ◽  
Yong-Joo Doh
Keyword(s):  
Topological Insulator ◽  
Electrical Detection ◽  
Spin Polarized

scholarly journals Spin-Polarized Angle-Resolved Photoelectron Spectroscopy of the So-Predicted Kondo Topological Insulator SmB6

2014 ◽  
Vol 83 (1) ◽  
pp. 014705 ◽  
Author(s):  
Shigemasa Suga ◽  
Kazuyuki Sakamoto ◽  
Taichi Okuda ◽  
Koji Miyamoto ◽  
Kenta Kuroda ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Photoelectron Spectroscopy ◽  
Spin Polarized
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