scholarly journals Spin-Orbit Coupling in Single-Layer Ferrimagnets: Direct Observation of Spin-Orbit Torques and Chiral Spin Textures

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Sachin Krishnia ◽  
Eloi Haltz ◽  
Léo Berges ◽  
Lucia Aballe ◽  
Michael Foerster ◽  
...  
Keyword(s):  
Direct Observation ◽  
Single Layer ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit

Plasmon modes in N-layer silicene structures

2021 ◽  
Author(s):  
Men Nguyen Van
Keyword(s):  
Electric Field ◽  
Random Phase ◽  
Single Layer ◽  
Plasmon Mode ◽  
Orbit Coupling ◽  
Collective Excitations ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Number Of Layers ◽  
Plasmon Modes

Abstract We investigate the plasmon properties in N-layer silicene systems consisting of N, up to 6, parallel single-layer silicene under the application of an out-of-plane electric field, taking into account the spin-orbit coupling within the random-phase approximation. Numerical calculations demonstrate that N undamped plasmon modes, including one in-phase optical and (N-1) out-of-phase acoustic modes, continue mainly outside the single-particle excitation area of the system. As the number of layers increases, the frequencies of plasmonic collective excitations increase and can become much larger than that in single layer silicene, more significant for high-frequency modes. The optical (acoustic) plasmon mode(s) noticeably (slightly) decreases with the increase in the bandgap and weakly depends on the number of layers. We observe that the phase transition of the system weakly affects the plasmon properties, and as the bandgap caused by the spin-orbit coupling equal that caused by the external electric field, the plasmonic collective excitations and their broadening function in multilayer silicene behave similarly to those in multilayer gapless graphene structures. Our investigations show that plasmon curves in the system move toward that in single layer silicene as the separation increases, and the impacts of this factor can be raised by a large number of layers in the system. Finally, we find that the imbalanced carrier density between silicene layers significantly decreases plasmon frequencies, depending on the number of layers.

scholarly journals Direct Observation of Interband Spin-Orbit Coupling in a Two-Dimensional Electron System

2012 ◽  
Vol 108 (19) ◽  
Author(s):  
Hendrik Bentmann ◽  
Samir Abdelouahed ◽  
Mattia Mulazzi ◽  
Jürgen Henk ◽  
Friedrich Reinert
Keyword(s):  
Direct Observation ◽  
Electron System ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Dimensional Electron System

scholarly journals Direct observation of spin–orbit coupling in iron-based superconductors

2015 ◽  
Vol 12 (4) ◽  
pp. 311-317 ◽  
Author(s):  
S. V. Borisenko ◽  
D. V. Evtushinsky ◽  
Z.-H. Liu ◽  
I. Morozov ◽  
R. Kappenberger ◽  
...  
Keyword(s):  
Direct Observation ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Iron Based Superconductors ◽  
Iron Based

scholarly journals Electronic Properties of Bulk and Single-Layer MoS2 Using ab Initio DFT: Application of Spin-Orbit Coupling (SOC) Parameters

2020 ◽  
Keyword(s):  
Electronic Properties ◽  
Density Functional ◽  
Transition Metal Dichalcogenides ◽  
Single Layer ◽  
Valence Band Maximum ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Monolayer Mos2 ◽  
Bulk Mos2

Two dimensional (2D) materials are currently gaining a lot of interest due to excellent properties that are different from their bulk structures. Single and few-layered of Transition metal dichalcogenides (TMDCs) have a bandgap that ranges between 1-2 eV, which is used for FET devices or any optoelectronic devices. Within TMDCs, a ton of consideration is focused on Molybdenum Disulfide (MoS2) because of its promising band gap-tuning and transition between direct to indirect bandgap properties relies upon its thickness. The density functional theory (DFT) calculations with different functionals and spin-orbit coupling (SOC) parameters were carried out to study the electronic properties of bulk and monolayer MoS2. The addition of SOC brought about a noteworthy change in the profile of the band energy, explicitly the splitting of the valence band maximum (VBM) into two sub-bands. The indirect bandgap in bulk MoS2 ranges from 1.17- 1.71eV and that of the monolayer bandgap was 1.6 – 1.71eV. The calculated parameters were compared to the obtained experimental and theoretical results. The obtained density of states (DOS) can be used in explaining the nature of bandgap in both the bulk and monolayer MoS2. These electronic characteristics are important for applications in material devices and energy-saving applications

scholarly journals Coherent quantum transport through ferromagnetic graphene structures: Effects of Rashba spin–orbit coupling

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
Kobra Hasanirokh ◽  
Fezzeh Naderi
Keyword(s):  
Transport Properties ◽  
Quantum Transport ◽  
Structural Parameters ◽  
Single Layer ◽  
Orbit Coupling ◽  
Single Layer Graphene ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Layer Graphene ◽  
Rashba Spin

Abstract In a system consisting of a monolayer ferromagnetic graphene structure, based on the scattering matrix approach, we study the spin-dependent transmission coefficients, group delay time, magnetoresistance and giant magnetoresistance of spin-polarized electron tunneling through the Rashba barrier in single-layer graphene. The results show that Rashba spin–orbit coupling can cause a natural spin filter mechanism; it thus has a significant role in controlling the transmission probabilities. In addition, the quantum transport properties of our system depend critically on the structural parameters. The incidence angle, energy, barrier number, and exchange energies can strongly control the transport properties of multi-layer graphene. It is predicted that controlling spin-dependent transport in single layer graphene results can develop the well-known spintronics.

Sign in / Sign up

Export Citation Format

Share Document