Valence Band Splitting on Multilayer MoS2: Mixing of Spin–Orbit Coupling and Interlayer Coupling

2016 ◽  
Vol 7 (12) ◽  
pp. 2175-2181 ◽  
Author(s):  
Xiaofeng Fan ◽  
David J. Singh ◽  
Weitao Zheng
Keyword(s):  
Valence Band ◽  
Interlayer Coupling ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Band Splitting ◽  
Valence Band Splitting

Probing Spin–Orbit Coupling and Interlayer Coupling in Atomically Thin Molybdenum Disulfide Using Hydrostatic Pressure

ACS Nano ◽  
2016 ◽  
Vol 10 (1) ◽  
pp. 1619-1624 ◽  
Author(s):  
Xiuming Dou ◽  
Kun Ding ◽  
Desheng Jiang ◽  
Xiaofeng Fan ◽  
Baoquan Sun
Keyword(s):  
Hydrostatic Pressure ◽  
Molybdenum Disulfide ◽  
Interlayer Coupling ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit

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

scholarly journals Boosting proximity spin–orbit coupling in graphene/WSe2 heterostructures via hydrostatic pressure

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Bálint Fülöp ◽  
Albin Márffy ◽  
Simon Zihlmann ◽  
Martin Gmitra ◽  
Endre Tóvári ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Proximity Effect ◽  
Weak Localization ◽  
Interlayer Coupling ◽  
Proximity Effects ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Weak Antilocalization ◽  
Atomic Orbitals

AbstractVan der Waals heterostructures composed of multiple few layer crystals allow the engineering of novel materials with predefined properties. As an example, coupling graphene weakly to materials with large spin–orbit coupling (SOC) allows to engineer a sizeable SOC in graphene via proximity effects. The strength of the proximity effect depends on the overlap of the atomic orbitals, therefore, changing the interlayer distance via hydrostatic pressure can be utilized to enhance the interlayer coupling between the layers. In this work, we report measurements on a graphene/WSe2 heterostructure exposed to increasing hydrostatic pressure. A clear transition from weak localization to weak antilocalization is visible as the pressure increases, demonstrating the increase of induced SOC in graphene.

Spin–orbit splitting in graphene, silicene and germanene: Dependence on buckling

2018 ◽  
Vol 32 (05) ◽  
pp. 1850055 ◽  
Author(s):  
Ranber Singh
Keyword(s):  
Valence Band ◽  
Valence Band Maximum ◽  
Honeycomb Structure ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Band Maximum ◽  
Honeycomb Structures ◽  
Spin Orbit Splitting

The spin–orbit splitting (E[Formula: see text]) of valence band maximum at the [Formula: see text] point is significantly smaller in 2D planner honeycomb structures of graphene, silicene, germanene and BN than that in the corresponding 3D bulk counterparts. For 2D planner honeycomb structure of SiC, it is almost same as that for 3D bulk cubic SiC. The bandgap which opens at the K and K[Formula: see text] points due to spin–orbit coupling (SOC) is very small in flat honeycomb structures of graphene and silicene, while in germanene it is about 2 meV. The buckling in these structures of graphene, silicene and germanene increases the bandgap opened at the K and K[Formula: see text] points due to SOC quadratically, while the E[Formula: see text] of valence band maximum at the [Formula: see text] point decreases quadratically with an increase in the magnitude of buckling.

scholarly journals Band splitting with vanishing spin polarizations in noncentrosymmetric crystals

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Kai Liu ◽  
Wei Luo ◽  
Junyi Ji ◽  
Paolo Barone ◽  
Silvia Picozzi ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Orbit Coupling ◽  
High Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Energy Bands ◽  
Solid State Physics ◽  
Bulk Gaas ◽  
Spintronic Devices ◽  
Band Splitting

Abstract The Dresselhaus and Rashba effects are well-known phenomena in solid-state physics, in which spin–orbit coupling splits spin-up and spin-down energy bands of nonmagnetic non-centrosymmetric crystals. Here, we discuss a phenomenon we dub band splitting with vanishing spin polarizations (BSVSP), in which, as usual, spin-orbit coupling splits the energy bands in nonmagnetic non-centrosymmetric systems. Surprisingly, however, both split bands show no net spin polarization along certain high-symmetry lines in the Brillouin zone. In order to rationalize this phenomenon, we propose a classification of point groups into pseudo-polar and non-pseudo-polar groups. By means of first-principles simulations, we demonstrate that BSVSP can take place in both symmorphic (e.g., bulk GaAs) and non-symmorphic systems (e.g., two dimensional ferroelectric SnTe). Furthermore, we identify a linear magnetoelectric coupling in reciprocal space, which could be employed to tune the spin polarization with an external electric field. The BSVSP effect and its manipulation could therefore form the basis for future spintronic devices.

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