Topological Phase Control of Surface States in Bi2Se3 via Spin–Orbit Coupling Modulation through Interface Engineering between HfO2–X

2020 ◽  
Vol 12 (10) ◽  
pp. 12215-12226
Author(s):  
Kwangsik Jeong ◽  
Hanbum Park ◽  
Jimin Chae ◽  
Kyung-ik Sim ◽  
Won Jun Yang ◽  
...  
Keyword(s):  
Surface States ◽  
Phase Control ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Topological Phase ◽  
Spin Orbit ◽  
Interface Engineering

scholarly journals Absence of the Rashba Splitting of Au(111) Surface Bands

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
I. N. Yakovkin
Keyword(s):  
Electronic Structure ◽  
Dft Calculations ◽  
Surface States ◽  
Orbit Coupling ◽  
Spin Splitting ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Relativistic Approximation ◽  
Photoemission Experiment

The electronic structure of Au(111) films is studied by means of relativistic DFT calculations. It is found that the twinning of the surface bands, observed in photoemission experiment, does not necessarily correspond to the spin-splitting of the surface states caused by the break of the inversion symmetry at the surface. The twinning of the bands of clean Au(111) films can be obtained within nonrelativistic or scalar-relativistic approximation, so that it is not a result of spin-orbit coupling. However, the spin-orbit coupling does not lead to the spin-splitting of the surface bands. This result is explained by Kramers’ degeneracy, which means that the existence of a surface itself does not destroy the inversion symmetry of the system. The inversion symmetry of the Au(111) film can be broken, for example, by means of adsorption, and a hydrogen monolayer deposited on one face of the film indeed leads to the appearance of the spin-splitting of the bands.

Spin–Orbit Coupling-Determined Topological Phase: Topological Insulator and Quadratic Dirac Semimetals

2020 ◽  
Vol 11 (24) ◽  
pp. 10340-10347
Author(s):  
Lu Tian ◽  
Ying Liu ◽  
Weizhen Meng ◽  
Xiaoming Zhang ◽  
Xuefang Dai ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Topological Phase ◽  
Spin Orbit ◽  
Dirac Semimetals
Sign in / Sign up

Export Citation Format

Share Document