scholarly journals Curvature-induced spin-orbit coupling and spin relaxation in a chemically clean single-layer graphene

2011 ◽  
Vol 84 (19) ◽  
Author(s):  
Jae-Seung Jeong ◽  
Jeongkyu Shin ◽  
Hyun-Woo Lee
Keyword(s):  
Spin Relaxation ◽  
Single Layer ◽  
Orbit Coupling ◽  
Single Layer Graphene ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Layer Graphene

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.

Femtosecond Laser Induced Spin Dynamics in Single Layer Graphene/CoFeB Thin Films

Nanoscale ◽  
2021 ◽  
Author(s):  
Surya Narayan Panda ◽  
Sudip Majumder ◽  
Samiran Choudhury ◽  
Arpan Bhattacharyya ◽  
Sumona Sinha ◽  
...  
Keyword(s):  
Thin Films ◽  
Spin Dynamics ◽  
Spin Current ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Layer Graphene ◽  
Important Building Block ◽  
Unique Ability

Graphene/Ferromagnet hybrid heterostructure is an important building block of spintronics due to unique ability of graphene to transport spin current over unprecedented distance and possible increase in its spin-orbit coupling...

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.

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