The enhancement of electron transportation and photo-catalytic activity for hydrogen generation by introducing spin-polarized current into dye-sensitized photo-catalyst

2016 ◽  
Vol 6 (21) ◽  
pp. 7693-7697 ◽  
Author(s):  
Wenyan Zhang ◽  
Gongxuan Lu
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Generation ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Photo Catalyst ◽  
Photo Catalytic Activity ◽  
Dye Sensitized ◽  
Rashba Spin ◽  
Spin Polarized ◽  
Electron Transportation

Implanting polyiodides into graphene not only realized spin-polarization of photo electrons, but induced an optimum Rashba spin–orbit coupling to promote the spin electrons tunneling through the honeycomb sub-lattices of graphene, thus the HER and TOF was highly improved.

SPONTANEOUS SPIN POLARIZATION OF ELECTRONS IN SiGe/Si HETEROSTRUCTURES

2010 ◽  
Vol 09 (05) ◽  
pp. 503-509
Author(s):  
A. JOHN PETER
Keyword(s):  
Zero Magnetic Field ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Resonant Level ◽  
Electron Transmission ◽  
Rashba Spin ◽  
Spin Polarized ◽  
Spin Filters ◽  
Spin Injectors ◽  
The One

The spin-dependent electron transmission phenomenon in an SiGe/Si/SiGe resonant semiconductor heterostructure is employed theoretically to investigate the output transmission current polarization at zero magnetic field. Transparency of electron transmission is calculated as a function of electron energy as well as the well width, within the one electron band approximation along with the spin-orbit interaction. Enhanced spin-polarized resonant tunneling in the heterostructure due to Dresselhaus and Rashba spin-orbit coupling induced splitting of the resonant level is observed. We predict that a spin-polarized current spontaneously emerges in this heterostructure and we estimate theoretically that the polarization can reach 100%. This effect could be employed in the fabrication of spin filters, spin injectors, and detectors based on nonmagnetic semiconductors.

scholarly journals Manipulation of Majorana bound states in proximity to a quantum ring with Rashba coupling

2021 ◽  
Author(s):  
Fabían Gonzalo Medina ◽  
Dunkan Martínez ◽  
Alvaro Díaz-Fernández ◽  
Francisco Domínguez-Adame ◽  
Luis Rosales ◽  
...  
Keyword(s):  
Bound States ◽  
Orbit Coupling ◽  
Quantum Ring ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Persistent Currents ◽  
Zero Modes ◽  
Rashba Spin ◽  
Spin Polarized ◽  
Rashba Coupling

Abstract The quest for Majorana zero modes in the laboratory is an active field of research in condensed matter physics. In this regard, there have been many theoretical proposals; however, their experimental detection remains elusive. In this article, we present a realistic setting by considering a quantum ring with Rashba spin-orbit coupling and threaded by a magnetic flux, in contact with a topological superconducting nanowire. We focus on spin-polarized persistent currents to assess the existence of Majorana zero modes. We find that the Rashba spin-orbit coupling allows for tuning the position of the zero modes and has sizable effects on spin-polarized persistent currents. Our results pave the way towards probing the existence of Majorana zero modes.

scholarly journals Enhancement of Rashba spin–orbit coupling by electron–electron interaction

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 78714-78719 ◽  
Author(s):  
Rouhollah Farghadan ◽  
Ali Sehat
Keyword(s):  
Electric Current ◽  
Orbit Coupling ◽  
Electron Interaction ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Output Current ◽  
Rashba Spin ◽  
Magnetic Elements ◽  
Spin Polarized

We studied how the electron–electron interaction enhances the strength of the Rashba spin–orbit coupling and opens the possibility of generating a spin-polarized output current from an unpolarized electric current without any magnetic elements.

Extrinsic Rashba spin–orbit coupling effect on silicene spin polarized field effect transistors

2017 ◽  
Vol 29 (14) ◽  
pp. 145501 ◽  
Author(s):  
Nezhat Pournaghavi ◽  
Mahdi Esmaeilzadeh ◽  
Adib Abrishamifar ◽  
Somaieh Ahmadi
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Coupling Effect ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin ◽  
Spin Polarized
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