Work

Magnetic resonance of spin current and its accompanying heating or cooling

Year: 2024

Type: article

Abstract: Motivated by the booming development of spintronics based on quantum dot systems, we employed the standard nonequilibrium Green’s function theory to derive the transport formula and the heat generation formula of a quantum dot coupled to a substrate and study the relation between spin current and its accompanying heating or cooling. Our results demonstrate that (i) a thermal bias combined with Zeeman splitting can generate steady spin current in a limited dot level range, while a rotating magnetic field can generate time-average spin current in a global range and pure spin current can induce more heat generation than non-pure spin current; (ii) magnetic resonance of spin current can also effectively enhance heat generation; (iii) appropriate environmental temperature in conjunction with a thermal bias makes cooling, while increasing the frequency of the rotating magnetic can easily give rise to the transition from cooling to heating; and (iv) enhancing the coupling between quantum dots and substrates can effectively reduce heat generation while maintaining the fundamental properties of pure spin current.

Source: Journal of Applied Physics

DOI: 10.1063/5.0230543

Authors: Yuxin Tang, Lin Zhang, Feng Jiang, Yonghong Yan, Yanyan Zhu

Institutions: Shanghai University of Electric Power, Shaoxing University

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funder: National Natural Science Foundation of China