scholarly journals Spin-Seebeck effect and spin polarization in a multiple quantum dot molecule

2017 ◽  
Vol 96 (16) ◽  
Author(s):  
J. P. Ramos-Andrade ◽  
F. J. Peña ◽  
A. González ◽  
O. Ávalos-Ovando ◽  
P. A. Orellana
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Seebeck Effect ◽  
Multiple Quantum ◽  
Spin Seebeck Effect

Spin Seebeck Effect in a Multiple Quantum Dot Molecule with Spin-Dependent Interdot Coupling

2018 ◽  
Vol 194 (3-4) ◽  
pp. 235-245 ◽  
Author(s):  
Lian-Liang Sun ◽  
Feng Chi ◽  
Zhen-Guo Fu ◽  
Shu-Chao Yu ◽  
Li-Ming Liu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Seebeck Effect ◽  
Multiple Quantum ◽  
Spin Seebeck Effect ◽  
Interdot Coupling

scholarly journals Spin Seebeck Effect in a Hybridized Quantum-Dot/Majorana-Nanowire With Spin Heat Accumulation

2021 ◽  
Vol 9 ◽  
Author(s):  
Lian-Liang Sun ◽  
Zhen-Guo Fu
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
High Efficiency ◽  
Seebeck Effect ◽  
Heat Accumulation ◽  
Topological Superconductor ◽  
Semiconductor Nanowire ◽  
Spin Seebeck Effect ◽  
Spin Polarized ◽  
Spin Heat Accumulation

Properties of spin Seebeck effect (SSE) in a quantum dot (QD) connected to a topological superconductor or semiconductor nanowire with strong spin-orbit interaction are theoretically studied by the noneqilibrium Green’s function method combined with Dyson equation technique. At low temperatures, Majorana zero modes (MZMs) are prepared at the ends of topological superconductor or semiconductor nanowire, and are hybridized to the QD with spin-dependent strength. We consider that the QD is coupled to two leads in the presence of spin heat accumulation (SHA), i.e., spin-dependent temperature in the leads. We find that the thermopower is spin-polarized when the hybridization strength between the QD and one mode of the MZMs depends on electron spin direction, and its spin-polarization can be effectively adjusted by changing the magnitude of SHA. By proper variation of the spin-polarization of the QD-MZM hybridization strength, magnitude of the SHA, dot level, or the direct coupling between the MZMs, 100% spin-polarized or pure thermopower can be generated. Our results may find real usage in high efficiency spintronic devices or detection of the MZMs, which are under current extensive study. The present model is within the reach of current nano-technologies and may by used in high efficiency spin caloritronics devices.

scholarly journals Topological isoconductance signatures in Majorana nanowires

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. S. Ricco ◽  
J. E. Sanches ◽  
Y. Marques ◽  
M. de Souza ◽  
M. S. Figueira ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Transport Properties ◽  
Spin Polarization ◽  
Bound States ◽  
Spin Asymmetry ◽  
Experimental Protocol ◽  
Zero Bias ◽  
Topological Superconductor ◽  
Hybrid Device ◽  
Majorana Bound States

AbstractWe consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. It is demonstrated that if highly nonlocal and nonoverlapping MBSs are formed in the system, the zero-bias Andreev conductance through the dot exhibits characteristic isoconductance profiles with the shape depending on the spin asymmetry of the coupling between the dot and the topological superconductor. Otherwise, for overlapping MBSs with less degree of nonlocality, the conductance is insensitive to the spin polarization and the isoconductance signatures disappear. This allows to propose an alternative experimental protocol for probing the nonlocality of the MBSs in Majorana nanowires.

scholarly journals Ultrafast measurements of the interfacial spin Seebeck effect in Au and rare-earth iron-garnet bilayers

2021 ◽  
Vol 5 (7) ◽  
Author(s):  
Víctor H. Ortiz ◽  
Michael J. Gomez ◽  
Yawen Liu ◽  
Mohammed Aldosary ◽  
Jing Shi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Seebeck Effect ◽  
Ultrafast Measurements ◽  
Spin Seebeck Effect ◽  
Iron Garnet

scholarly journals Enhancement of the spin Seebeck effect owing to bismuth substitution in thermoelectric generators fabricated from LPE Bi-substituted YIG films

AIP Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 035143
Author(s):  
Masaaki Imamura ◽  
Hironori Asada ◽  
Ryo Nishimura ◽  
Keita Yamaguchi ◽  
Daisuke Tashima ◽  
...  
Keyword(s):  
Seebeck Effect ◽  
Thermoelectric Generators ◽  
Spin Seebeck Effect
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