scholarly journals Deduction of pure spin current from the linear and circular spin photogalvanic effect in semiconductor quantum wells

2007 ◽  
Vol 75 (4) ◽  
Author(s):  
Bin Zhou ◽  
Shun-Qing Shen
Keyword(s):  
Quantum Wells ◽  
Spin Current ◽  
Pure Spin ◽  
Photogalvanic Effect ◽  
Semiconductor Quantum Wells

Pure spin current generation via photogalvanic effect with spatial inversion symmetry

2020 ◽  
Vol 102 (8) ◽  
Author(s):  
Xixi Tao ◽  
Peng Jiang ◽  
Hua Hao ◽  
Xiaohong Zheng ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Spin Current ◽  
Pure Spin ◽  
Inversion Symmetry ◽  
Current Generation ◽  
Photogalvanic Effect

Circular Photogalvanic Effect in SiGe Semiconductor Quantum Wells

2001 ◽  
Vol 690 ◽  
Author(s):  
Sergey D. Ganichev ◽  
Franz-Peter Kalz ◽  
Ulrich Rössler ◽  
Wilhelm Prettl ◽  
Eugenius L. Ivchenko ◽  
...  
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Infrared Radiation ◽  
Spin Splitting ◽  
Inversion Symmetry ◽  
Directed Motion ◽  
Spin Orientation ◽  
Photogalvanic Effect ◽  
Free Carriers ◽  
Semiconductor Quantum Wells

ABSTRACTThe photogalvanic effects, which require a system lacking inversion symmetry, become possible in SiGe based quantum well (QW) structures due to their built-in asymmetry. We report on observations of the circular and linear photogalvanic effects induced by infrared radiation in (001)-and (113)-orientedp–Si/Si1–xGex QW structures and analyse these observations in view of the possible symmetry of these structures. The circular photogalvanic effect arises due to optical spin orientation of free carriers in QWs with band splitting in k-space which results in a directed motion of free carriers in the plane of the QW. We discuss possible mechanisms that give rise to spin-splitting of the electronic subband states for different symmetries.

Pure spin current generation with photogalvanic effect in graphene interconnect junctions

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yan-Hong Zhou ◽  
Shaohui Yu ◽  
Yuejun Li ◽  
Xin Luo ◽  
Xiaohong Zheng ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Spin Current ◽  
Edge State ◽  
Polarization Angle ◽  
Pure Spin ◽  
Inversion Symmetry ◽  
Current Generation ◽  
Photogalvanic Effect ◽  
Charge Current ◽  
Zero Charge

Abstract We investigate the photovoltaic behaviors of magnetic graphene interconnect junctions, which are constructed by zigzag graphene nanoribbons (ZGNRs), with the aim to produce pure spin current by photogalvanic effect (PGE). Two kinds of interconnect junctions are designed by connecting two 6-ZGNR with a carbon hexagon (C6) and a carbon tetragon (C4), respectively. It is found that zero charge current is produced under irradiation of light in both structures due to the presence of spatial inversion symmetry. Nevertheless, behind the zero charge current, net pure spin current is produced in the structure with a C6, but not in the structure with a C4. This difference originates from their different edge state distribution and different spatial inversion symmetry of the spin density. However, interestingly, local edge pure spin current can be obtained in both structures. More importantly, the pure spin current generation is independent of the photon energy, polarization type or polarization angle, suggesting a robust way of generating pure spin current with PGE and new possibility of graphene’s applications in spintronics.

scholarly journals Spin photogalvanic effect in two-dimensional collinear antiferromagnets

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Rui-Chun Xiao ◽  
Ding-Fu Shao ◽  
Yu-Hang Li ◽  
Hua Jiang
Keyword(s):  
First Principles ◽  
Three Dimensional ◽  
Spin Current ◽  
Symmetry Analysis ◽  
Honeycomb Lattice ◽  
Pure Spin ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Photogalvanic Effect ◽  
Physical Phenomena

AbstractRecent discovered two-dimensional (2D) antiferromagnetic (AFM) van der Waals quantum materials have attracted increasing interest due to the emergent exotic physical phenomena. The spintronic properties utilizing the intrinsic AFM state in 2D antiferromagnets, however, have been rarely found. Here we show that the spin photogalvanic effect (SPGE), which has been predicted in three-dimensional (3D) antiferromagnets, can intrinsically emerge in 2D antiferromagnets for promising spintronic applications. Based on the symmetry analysis of possible AFM orders in the honeycomb lattice, we conclude suitable 2D AFM candidate materials for realizing the SPGE. We choose two experimentally synthesized 2D collinear AFM materials, monolayer MnPS3, and bilayer CrCl3, as representative materials to perform first-principles calculations, and find that they support sizable SPGE. The SPGE in collinear 2D AFM materials can be utilized to generate pure spin current in a contactless and ultra-fast way.

Robust generation of half-metallic transport and pure spin current with photogalvanic effect in zigzag silicene nanoribbons

2019 ◽  
Vol 31 (49) ◽  
pp. 495701 ◽  
Author(s):  
Peng Jiang ◽  
Lili Kang ◽  
Xixi Tao ◽  
Ning Cao ◽  
Hua Hao ◽  
...  
Keyword(s):  
Spin Current ◽  
Pure Spin ◽  
Photogalvanic Effect ◽  
Half Metallic ◽  
Silicene Nanoribbons

scholarly journals Circular photogalvanic effect at inter-band excitation in semiconductor quantum wells

2003 ◽  
Vol 128 (8) ◽  
pp. 283-286 ◽  
Author(s):  
V.V. Bel'kov ◽  
S.D. Ganichev ◽  
Petra Schneider ◽  
C. Back ◽  
M. Oestreich ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Photogalvanic Effect ◽  
Semiconductor Quantum Wells

Photogalvanic effect induced fully spin polarized current and pure spin current in zigzag SiC nanoribbons

2018 ◽  
Vol 20 (41) ◽  
pp. 26744-26751 ◽  
Author(s):  
Jun Chen ◽  
Liwen Zhang ◽  
Lei Zhang ◽  
Xiaohong Zheng ◽  
Liantuan Xiao ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Green's Function ◽  
First Principles ◽  
Density Functional ◽  
Spin Current ◽  
Pure Spin ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Photogalvanic Effect ◽  
Spin Polarized

Using nonequilibrium Green's function combined with density functional theory, we investigate the spin-related current generated by the photogalvanic effect (PGE) in monolayer zigzag SiC nanoribbons (ZSiCNRs) by first-principles calculations.

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