Influence of Spin-Orbit Coupling on Electronic Structure of Polyyne and Cumulene Carbynes

MRS Advances ◽  
2016 ◽  
Vol 1 (19) ◽  
pp. 1353-1357
Author(s):  
Sergey Karabanov ◽  
Pavel Dyachkov ◽  
Dmitry Suvorov ◽  
Gennady Gololobov ◽  
Dmitry Tarabrin ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Fermi Level ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Observational Method ◽  
Spin Orbital ◽  
Structure Splitting ◽  
Spin Orbital Coupling

ABSTRACTThe present paper has suggested a new non-observational method to calculate electronic structure of carbynes taking into consideration the influence of the spin-orbital coupling. The method is demonstrated by calculations of the structure splitting at the Fermi level in cumulene and polyyne carbynes having semiconductor and metallic electronic structure correspondingly. These couplings result in 2 - 3 meV gaps.

scholarly journals SPIN CURRENT IN SPIN–ORBIT COUPLING SYSTEMS

2003 ◽  
Vol 17 (31n32) ◽  
pp. 5991-6000 ◽  
Author(s):  
JIANGPING HU ◽  
BOGDAN A. BERNEVIG ◽  
CONGJUN WU
Keyword(s):  
Electric Field ◽  
Broad Class ◽  
Spin Current ◽  
Orbit Coupling ◽  
Direct Result ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Orbital ◽  
The Difference ◽  
Spin Orbital Coupling

We present a simple and pedagogical derivation of the spin current as the linear response to an external electric field for both Rashba and Luttinger spin–orbital coupling Hamiltonians. Except for the adiabatic approximation, our derivation is exact to the linear order of the electric field for both models. The spin current is a direct result of the difference in occupation levels between different bands. Moreover, we show a general topological spin current can be defined for a broad class of spin–orbit coupling systems.

scholarly journals Heisenberg and anisotropic exchange interactions in magnetic materials with correlated electronic structure and significant spin-orbit coupling

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
Vladislav Borisov ◽  
Yaroslav O. Kvashnin ◽  
Nikolaos Ntallis ◽  
Danny Thonig ◽  
Patrik Thunström ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Magnetic Materials ◽  
Exchange Interactions ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Anisotropic Exchange

scholarly journals How spin-orbital entanglement depends on the spin-orbit coupling in a Mott insulator

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Dorota Gotfryd ◽  
Ekaterina M. Pärschke ◽  
Jiří Chaloupka ◽  
Andrzej M. Oleś ◽  
Krzysztof Wohlfeld
Keyword(s):  
Mott Insulator ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Orbital

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.

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