A study of electronic band structure and spin orbit coupling of monolayer WSe2 for optoelectronic applications

2019 ◽  
Author(s):  
Dipali Nayak ◽  
R. Thangavel
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Electronic Band ◽  
Optoelectronic Applications

scholarly journals The effect of Rashba spin–orbit coupling on the spin- and valley-dependent electronic heat capacity of silicene

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 10650-10659 ◽  
Author(s):  
Mohsen Yarmohammadi
Keyword(s):  
Heat Capacity ◽  
Band Structure ◽  
Electronic Band Structure ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Electronic Heat Capacity ◽  
Electronic Band ◽  
Rashba Spin ◽  
Electronic Heat

In this work, we have investigated the effect of an electric field and Rashba spin–orbit coupling on the electronic band structure and electronic heat capacity of a ferromagnetic silicene material in three phases at Dirac points.

scholarly journals Strain and Spin-Orbit Coupling Engineering in Twisted WS2/Graphene Heterobilayer

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2921
Author(s):  
Cyrine Ernandes ◽  
Lama Khalil ◽  
Hugo Henck ◽  
Meng-Qiang Zhao ◽  
Julien Chaste ◽  
...  
Keyword(s):  
Band Structure ◽  
Density Functional ◽  
Electronic Band Structure ◽  
Twist Angle ◽  
Van Der Waals ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Electronic Band ◽  
Van Der Waals Materials

The strain in hybrid van der Waals heterostructures, made of two distinct two-dimensional van der Waals materials, offers an interesting handle on their corresponding electronic band structure. Such strain can be engineered by changing the relative crystallographic orientation between the constitutive monolayers, notably, the angular misorientation, also known as the “twist angle”. By combining angle-resolved photoemission spectroscopy with density functional theory calculations, we investigate here the band structure of the WS2/graphene heterobilayer for various twist angles. Despite the relatively weak coupling between WS2 and graphene, we demonstrate that the resulting strain quantitatively affects many electronic features of the WS2 monolayers, including the spin-orbit coupling strength. In particular, we show that the WS2 spin-orbit splitting of the valence band maximum at K can be tuned from 430 to 460 meV. Our findings open perspectives in controlling the band dispersion of van der Waals materials.

Effects of Spin-Orbit Coupling on the Electronic and Excitonic Structures of Monolayer WS2

2019 ◽  
Vol 966 ◽  
pp. 48-53
Author(s):  
Budi Eka Dharma ◽  
Ahmad Syahroni ◽  
Muhammad Aziz Majidi
Keyword(s):  
Electronic Band Structure ◽  
Transition Metal Dichalcogenides ◽  
Grid Method ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Electronic Band ◽  
Independent Particle ◽  
Particle Level ◽  
Metal Dichalcogenides

Transition metal dichalcogenides (TMDs) display unique properties in their monolayer structures, namely a direct band-gap transition, which becomes a promising candidate for optoelectronics applications. Among them, WS2 exhibits strong spin-orbit interaction which splits the excitonic peaks as observed in the experimental data up to ~400 meV. Unlike the other TMDs, the first excitonic peak A is very sharp for WS2, while the secondary peak B is broader with smaller relative intensity. In this paper, we perform first-principles calculations on the electronic band structure and solve the Bethe-Salpeter equation for the complex dielectric function of monolayer WS2 to study the effects of spin-orbit coupling on its excitonic structures. To resolve the excitonic peaks, in particular the B peak, we implement the double-grid method. We discuss the effects of electron-hole interaction on the absorption spectrum by comparing it with that calculated at the independent-particle level.

scholarly journals Band-structure topologies of graphene: Spin-orbit coupling effects from first principles

2009 ◽  
Vol 80 (23) ◽  
Author(s):  
M. Gmitra ◽  
S. Konschuh ◽  
C. Ertler ◽  
C. Ambrosch-Draxl ◽  
J. Fabian
Keyword(s):  
Band Structure ◽  
First Principles ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Effects

FIRST-PRINCIPLES STUDIES ON THE ELECTRONIC STRUCTURE OF LuPd2Si2

2009 ◽  
Vol 23 (32) ◽  
pp. 5929-5934 ◽  
Author(s):  
T. JEONG
Keyword(s):  
Band Structure ◽  
First Principles ◽  
Density Functional ◽  
Electronic Band Structure ◽  
Local Density ◽  
Spin Orbit Coupling ◽  
Electronic Band ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Structure Scheme

The electronic band structure of LuPd 2 Si 2 was studied based on the density functional theory within local density approximation and fully relativistic schemes. The Lu 4f states are completely filled and have flat bands around -5.0 eV. The fully relativistic band structure scheme shows that spin–orbit coupling splits the 4f states into two manifolds, the 4f7/2 and the 4f5/2 multiplet.

Valence band structure of YMnO3 and the spin orbit coupling

2013 ◽  
Vol 102 (18) ◽  
pp. 182902 ◽  
Author(s):  
Manish Kumar ◽  
R. J. Choudhary ◽  
D. M. Phase
Keyword(s):  
Band Structure ◽  
Valence Band ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Valence Band Structure
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