The Influence of the Optical Phonons on the Non-equilibrium Spin Current in the Presence of Spin–Orbit Couplings

2015 ◽  
Vol 182 (3-4) ◽  
pp. 92-106
Author(s):  
K. Hasanirokh ◽  
A. Phirouznia ◽  
R. Majidi
Keyword(s):  
Spin Current ◽  
Spin Orbit ◽  
Optical Phonons ◽  
Non Equilibrium

Spin currents in semiconductor nanostructures: A non-equilibrium Green-function approach

2017 ◽  
Author(s):  
Branislav K. Nikolic ◽  
Liviu P. Zarbo ◽  
Satofumi Souma
Keyword(s):  
Green Function ◽  
Spin Current ◽  
Semiconductor Nanostructures ◽  
Pure Spin ◽  
Current Operator ◽  
Spin Orbit ◽  
Spin Currents ◽  
Low Dimensional ◽  
Green Function Approach ◽  
Non Equilibrium

This article examines spin currents and spin densities in realistic open semiconductor nanostructures using different tools of quantum-transport theory based on the non-equilibrium Green function (NEGF) approach. It begins with an introduction to the essential theoretical formalism and practical computational techniques before explaining what pure spin current is and how pure spin currents can be generated and detected. It then considers the spin-Hall effect (SHE), and especially the mesoscopic SHE, along with spin-orbit couplings in low-dimensional semiconductors. It also describes spin-current operator, spindensity, and spin accumulation in the presence of intrinsic spin-orbit couplings, as well as the NEGF approach to spin transport in multiterminal spin-orbit-coupled nanostructures. The article concludes by reviewing formal developments with examples drawn from the field of the mesoscopic SHE in low-dimensional spin-orbit-coupled semiconductor nanostructures.

Persistent Spin Current in a Quantum Wire with Weak Rashba Spin–Orbit Coupling

2006 ◽  
Vol 23 (11) ◽  
pp. 3065-3068 ◽  
Author(s):  
Wang Yi ◽  
Sheng Wei ◽  
Zhou Guang-Hui
Keyword(s):  
Quantum Wire ◽  
Spin Current ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

Non-equilibrium spin-current induced by random Rashba field

2014 ◽  
Vol 65 (2) ◽  
pp. 20601
Author(s):  
Arash Phirouznia ◽  
Vahideh Tolouei Gavgani
Keyword(s):  
Spin Current ◽  
Non Equilibrium

scholarly journals Analysis of Bose system in spin-orbit coupled Bose-Fermi mixture to induce a spin current of fermions

2018 ◽  
Vol 969 ◽  
pp. 012014 ◽  
Author(s):  
R Sakamoto ◽  
Y Ono ◽  
R Hatsuda ◽  
K Shiina ◽  
E Arahata ◽  
...  
Keyword(s):  
Spin Current ◽  
Bose System ◽  
Spin Orbit

scholarly journals Orbital torque in magnetic bilayers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dongjoon Lee ◽  
Dongwook Go ◽  
Hyeon-Jong Park ◽  
Wonmin Jeong ◽  
Hye-Won Ko ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Hall Effect ◽  
Spin Current ◽  
Spin Hall Effect ◽  
Spin Orbit ◽  
Magnetic Torque ◽  
Device Applications ◽  
Metal Bilayers ◽  
Experiment Analysis ◽  
Theory And Experiment

AbstractThe orbital Hall effect describes the generation of the orbital current flowing in a perpendicular direction to an external electric field, analogous to the spin Hall effect. As the orbital current carries the angular momentum as the spin current does, injection of the orbital current into a ferromagnet can result in torque on the magnetization, which provides a way to detect the orbital Hall effect. With this motivation, we examine the current-induced spin-orbit torques in various ferromagnet/heavy metal bilayers by theory and experiment. Analysis of the magnetic torque reveals the presence of the contribution from the orbital Hall effect in the heavy metal, which competes with the contribution from the spin Hall effect. In particular, we find that the net torque in Ni/Ta bilayers is opposite in sign to the spin Hall theory prediction but instead consistent with the orbital Hall theory, which unambiguously confirms the orbital torque generated by the orbital Hall effect. Our finding opens a possibility of utilizing the orbital current for spintronic device applications, and it will invigorate researches on spin-orbit-coupled phenomena based on orbital engineering.

scholarly journals Non-equilibrium longitudinal and transverse optical phonons in terahertz quantum cascade lasers

2012 ◽  
Vol 100 (9) ◽  
pp. 091101 ◽  
Author(s):  
Miriam S. Vitiello ◽  
Rita C. Iotti ◽  
Fausto Rossi ◽  
Lukas Mahler ◽  
Alessandro Tredicucci ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Transverse Optical ◽  
Optical Phonons ◽  
Quantum Cascade ◽  
Cascade Lasers ◽  
Non Equilibrium

scholarly journals Nonlinear spin current generation in noncentrosymmetric spin-orbit coupled systems

2017 ◽  
Vol 95 (22) ◽  
Author(s):  
Keita Hamamoto ◽  
Motohiko Ezawa ◽  
Kun Woo Kim ◽  
Takahiro Morimoto ◽  
Naoto Nagaosa
Keyword(s):  
Spin Current ◽  
Coupled Systems ◽  
Spin Orbit ◽  
Current Generation
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