scholarly journals Generation of pure spin current in graphene nanoribbons with continous antidots

2021 ◽  
Vol 70 (19) ◽  
pp. 198503-198503
Author(s):  
Chen Xing ◽  
◽  
Zhao Han ◽  
Zhang Yan ◽  
Liu Lu ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Spin Current ◽  
Pure Spin

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.

Generating pure spin current in zigzag graphene nanoribbons by a thermal gradient: the effect of edge doping with BN pairs

2020 ◽  
Vol 53 (48) ◽  
pp. 485304
Author(s):  
Lingling Song ◽  
Liwei Yuan ◽  
Zhihong Yang ◽  
Xing Chen ◽  
Han Zhao ◽  
...  
Keyword(s):  
Thermal Gradient ◽  
Graphene Nanoribbons ◽  
Spin Current ◽  
Pure Spin ◽  
Zigzag Graphene Nanoribbons

scholarly journals Spin current distribution in antiferromagnetic zigzag graphene nanoribbons under transverse electric fields

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie Zhang ◽  
Eric P. Fahrenthold
Keyword(s):  
Electric Fields ◽  
Transverse Electric ◽  
Graphene Nanoribbons ◽  
Spin Current ◽  
Differential Resistance ◽  
Current Control ◽  
Field Analysis ◽  
Current Transmission ◽  
Transverse Electric Fields ◽  
Zigzag Graphene Nanoribbons

AbstractThe spin current transmission properties of narrow zigzag graphene nanoribbons (zGNRs) have been the focus of much computational research, investigating the potential application of zGNRs in spintronic devices. Doping, fuctionalization, edge modification, and external electric fields have been studied as methods for spin current control, and the performance of zGNRs initialized in both ferromagnetic and antiferromagnetic spin states has been modeled. Recent work has shown that precise fabrication of narrow zGNRs is possible, and has addressed long debated questions on their magnetic order and stability. This work has revived interest in the application of antiferromagnetic zGNR configurations in spintronics. A general ab initio analysis of narrow antiferromagnetic zGNR performance under a combination of bias voltage and transverse electric field loading shows that their current transmission characteristics differ sharply from those of their ferromagnetic counterparts. At relatively modest field strengths, both majority and minority spin currents react strongly to the applied field. Analysis of band gaps and current transmission pathways explains the presence of negative differential resistance effects and the development of spatially periodic electron transport structures in these nanoribbons.

scholarly journals Pure spin photocurrent in non-centrosymmetric crystals: bulk spin photovoltaic effect

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Haowei Xu ◽  
Hua Wang ◽  
Jian Zhou ◽  
Ju Li
Keyword(s):  
Mirror Symmetry ◽  
Photovoltaic Effect ◽  
Transition Metal Dichalcogenides ◽  
Spin Current ◽  
Pure Spin ◽  
Light Illumination ◽  
Metal Dichalcogenides ◽  
Critical Components ◽  
Topological Crystalline Insulator

AbstractSpin current generators are critical components for spintronics-based information processing. In this work, we theoretically and computationally investigate the bulk spin photovoltaic (BSPV) effect for creating DC spin current under light illumination. The only requirement for BSPV is inversion symmetry breaking, thus it applies to a broad range of materials and can be readily integrated with existing semiconductor technologies. The BSPV effect is a cousin of the bulk photovoltaic (BPV) effect, whereby a DC charge current is generated under light. Thanks to the different selection rules on spin and charge currents, a pure spin current can be realized if the system possesses mirror symmetry or inversion-mirror symmetry. The mechanism of BSPV and the role of the electronic relaxation time $$\tau$$ τ are also elucidated. We apply our theory to several distinct materials, including monolayer transition metal dichalcogenides, anti-ferromagnetic bilayer MnBi2Te4, and the surface of topological crystalline insulator cubic SnTe.

scholarly journals Dynamically generated pure spin current in single-layer graphene

2013 ◽  
Vol 87 (14) ◽  
Author(s):  
Zhenyao Tang ◽  
Eiji Shikoh ◽  
Hiroki Ago ◽  
Kenji Kawahara ◽  
Yuichiro Ando ◽  
...  
Keyword(s):  
Spin Current ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Pure Spin ◽  
Layer Graphene
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