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Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve.
Hu, Guanjian; Hu, Jing; Wang, Shikuan; Li, RuiQiang; Yan, Yiying; Luo, JunYan.
Afiliación
  • Hu G; Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, People's Republic of China.
  • Hu J; Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, People's Republic of China.
  • Wang S; Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.
  • Li R; Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, People's Republic of China.
  • Yan Y; Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, People's Republic of China.
  • Luo J; Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, People's Republic of China.
J Phys Condens Matter ; 36(29)2024 Apr 22.
Article en En | MEDLINE | ID: mdl-38604158
ABSTRACT
We investigate the noise in spin transport through a single quantum dot (QD) tunnel coupled to ferromagnetic (FM) electrodes with noncollinear magnetizations. Based on a spin-resolved quantum master equation, auto- and cross-correlations of spin-resolved currents are analyzed to reveal the underlying spin transport dynamics and characteristics for various polarizations. We find the currents of majority and minority spins could be strongly autocorrelated despite uncorrelated charge transfer. The interplay between tunnel coupling and the Coulomb interaction gives rise to an exchange magnetic field, leading to the precession of the accumulated spin in the QD. It strongly suppresses the bunching of spin tunneling events and results in a unique double-peak structure in the noise of the net spin current. The spin autocorrelation is found to be susceptible to magnetization alignments, which may serve as a sensitive tool to measure the magnetization directions between the FM electrodes.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido