Tight-Binding Calculation of3dBands of Fe with and without Spin-Orbit Coupling

1969 ◽  
Vol 185 (2) ◽  
pp. 861-861 ◽  
Author(s):  
E. Abate ◽  
M. Asdente
Keyword(s):  
Tight Binding ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit

scholarly journals Tight-binding theory of the spin-orbit coupling in graphene

2010 ◽  
Vol 82 (24) ◽  
Author(s):  
Sergej Konschuh ◽  
Martin Gmitra ◽  
Jaroslav Fabian
Keyword(s):  
Tight Binding ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Binding Theory

SPIN-ORBIT COUPLING IN GRAPHENE UNDER UNIAXIAL STRAIN: TIGHT-BINDING APPROACH AND FIRST-PRINCIPLES CALCULATIONS

2011 ◽  
Vol 25 (11) ◽  
pp. 823-830 ◽  
Author(s):  
BAIHUA GONG ◽  
XIN-HUI ZHANG ◽  
ER-HU ZHANG ◽  
SHENG-LI ZHANG
Keyword(s):  
Band Gap ◽  
First Principles ◽  
Tight Binding ◽  
Uniaxial Strain ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
First Principles Calculations ◽  
Binding Model ◽  
Tight Binding Approximation

Tuning the spin-orbit coupling (SOC) in graphene is highly desired for its application in spintronics. In this paper, we calculated the band gap induced by SOC in graphene under uniaxial strain from a tight-binding model, and found that the band gap has a monotonic increasing dependence on the strain in the range of -20% to 15%. Our results suggest that strain can be used as a reversible and controllable way to tune the SOC in graphene. First-principles calculations were performed, confirming the results of tight-binding approximation.

Quantum anomalous Hall effect on a square lattice with spin–orbit couplings and an exchange field

2014 ◽  
Vol 92 (5) ◽  
pp. 420-424 ◽  
Author(s):  
Xiaoyong Guo ◽  
Xiaobin Ren ◽  
Guangjie Guo ◽  
Jie Peng
Keyword(s):  
Tight Binding ◽  
Chern Number ◽  
Orbit Coupling ◽  
Square Lattice ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Exchange Field ◽  
Edge States ◽  
Binding Model ◽  
Spatial Direction

We investigate a tight-binding model on a two-dimensional square lattice with three terms: the Rashba spin–orbit coupling, the real amplitude next-nearest spin–orbit coupling, and an exchange field. We calculate the first Chern number to identify band topology. It is found that the Chern number takes the quantized values of C1 = 1, 2 and the chiral edge modes can be obtained. Therefore our model realizes the quantum anomalous Hall (QAH) effect. The Rashba coupling is positive for the QAH phase while the next-nearest coupling is detrimental to it. By increasing the exchange field intensity, the Chern number changes from quantized value 2 to 0. The behavior of the edge states is also studied. Particularly for C1 = 2 case, there are two gapless spin-polarized edge states with the same spin polarization moving in the same spatial direction. This indicates that their appearance is topological rather than accidental.

scholarly journals Tight-binding theory of spin-orbit coupling in graphynes

2014 ◽  
Vol 90 (19) ◽  
Author(s):  
Guido van Miert ◽  
Vladimir Juričić ◽  
Cristiane Morais Smith
Keyword(s):  
Tight Binding ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Binding Theory
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