scholarly journals Magnetic exchange and nonequilibrium spin current through interacting quantum dots

2015 ◽  
Vol 91 (24) ◽  
Author(s):  
Silas Hoffman ◽  
Yaroslav Tserkovnyak
Keyword(s):  
Quantum Dots ◽  
Spin Current ◽  
Magnetic Exchange

Spin pump effects on the spin current through two coupled quantum dots

2008 ◽  
Vol 62 (1) ◽  
pp. 71-76 ◽  
Author(s):  
H. Pan ◽  
S.-Q. Duan ◽  
L.-N. Zhao ◽  
W.-D. Chu ◽  
W. Zhang
Keyword(s):  
Quantum Dots ◽  
Spin Current ◽  
Coupled Quantum Dots ◽  
Spin Pump

Spin-current switch based on vertical asymmetric double quantum dots containing single manganese

2012 ◽  
Vol 111 (7) ◽  
pp. 07C320
Author(s):  
Fanyao Qu ◽  
L. Villegas-Lelovsky ◽  
Marcos R. Guassi ◽  
V. López-Richard ◽  
G. E. Marques
Keyword(s):  
Quantum Dots ◽  
Spin Current ◽  
Double Quantum ◽  
Current Switch ◽  
Double Quantum Dots

scholarly journals Multiferroic heterostructures for spintronics

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Elzbieta Gradauskaite ◽  
Peter Meisenheimer ◽  
Marvin Müller ◽  
John Heron ◽  
Morgan Trassin
Keyword(s):  
Thin Film ◽  
Mechanical Strain ◽  
Spin Current ◽  
Magnetic Exchange ◽  
Magnetic Systems ◽  
Current State ◽  
Recent Developments ◽  
Magnetic Orders ◽  
Multiferroic Heterostructures ◽  
Logic Functions

AbstractFor next-generation technology, magnetic systems are of interest due to the natural ability to store information and, through spin transport, propagate this information for logic functions. Controlling the magnetization state through currents has proven energy inefficient. Multiferroic thin-film heterostructures, combining ferroelectric and ferromagnetic orders, hold promise for energy efficient electronics. The electric field control of magnetic order is expected to reduce energy dissipation by 2–3 orders of magnitude relative to the current state-of-the-art. The coupling between electrical and magnetic orders in multiferroic and magnetoelectric thin-film heterostructures relies on interfacial coupling though magnetic exchange or mechanical strain and the correlation between domains in adjacent functional ferroic layers. We review the recent developments in electrical control of magnetism through artificial magnetoelectric heterostructures, domain imprint, emergent physics and device paradigms for magnetoelectric logic, neuromorphic devices, and hybrid magnetoelectric/spin-current-based applications. Finally, we conclude with a discussion of experiments that probe the crucial dynamics of the magnetoelectric switching and optical tuning of ferroelectric states towards all-optical control of magnetoelectric switching events.

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.

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