Pure spin-current diode based on an interacting quantum dot tunneling junction

2021 ◽  
Author(s):  
Zhengzhong Zhang ◽  
Min Yu ◽  
Rui Bo ◽  
Chao Wang ◽  
Hao Liu
Keyword(s):  
Quantum Dot ◽  
Spin Current ◽  
Pure Spin ◽  
Tunneling Junction

Thermally driven pure spin current through an interacting quantum dot

2020 ◽  
Vol 384 (24) ◽  
pp. 126607
Author(s):  
Hua Zhao ◽  
Xiaowei Zhang ◽  
Xiaochun Liu ◽  
Zhongqin Yang
Keyword(s):  
Quantum Dot ◽  
Spin Current ◽  
Pure Spin ◽  
Thermally Driven

scholarly journals Optimal single quantum dot heat-to-pure-spin-current converters

2015 ◽  
Vol 478 ◽  
pp. 153-160 ◽  
Author(s):  
Siddharth Buddhiraju ◽  
Bhaskaran Muralidharan
Keyword(s):  
Quantum Dot ◽  
Spin Current ◽  
Pure Spin ◽  
Single Quantum ◽  
Single Quantum Dot

Spin thermoelectric transport in a four-quantum-dot ring: Influence of quantum dots magnetization

2018 ◽  
Vol 32 (33) ◽  
pp. 1850412 ◽  
Author(s):  
Feng Liang ◽  
Dong Zhang ◽  
Ben-Ling Gao ◽  
Yan-Zong Wang ◽  
Yu Gu
Keyword(s):  
Quantum Dots ◽  
Energy Level ◽  
Quantum Dot ◽  
Figure Of Merit ◽  
Spin Current ◽  
Pure Spin ◽  
Thermoelectric Effects ◽  
Thermoelectric Transport ◽  
Thermal Generator ◽  
Non Equilibrium Green’S Function

Non-equilibrium Green’s function method is applied to study the spin thermoelectric effects in a four-quantum-dot ring with two of the quantum dots magnetized. The influence of magnetic configuration on the spin thermoelectric transport through the system is investigated. In some magnetic configurations, a significant spin Seebeck coefficient [Formula: see text] can be generated with the variation of the quantum dot (QD) energy level. Appropriately tuning the QD energy level can let the present device work as a pure spin-up (spin-down) or a pure-spin-current thermal generator. The combined effect of the magnetization and magnetic flux (or Rashba spin-orbit coupling) is also investigated. Finally, the charge figure of merit [Formula: see text] and spin figure of merit [Formula: see text] are evaluated, it is found that the magnitude of the spin figure of merit can be comparable to that of the charge counterpart.

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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