Pumped Spin-Current and Shot-Noise Spectra of a Single Quantum Dot

Bing Dong, H. L. Cui, and X. L. Lei
Phys. Rev. Lett. 94, 066601 – Published 16 February 2005

Abstract

We exploit the pumped spin-current and current noise spectra under equilibrium conditions in a single quantum dot connected to two normal leads as an electrical scheme for detection of the electron spin resonance (ESR) and decoherence. We propose spin-resolved quantum rate equations with correlation functions in Laplace space for the analytical derivation of the zero-frequency auto- and cross-shot noise spectra of charge and spin current. Our results show that in the strong Coulomb blockade regime, ESR-induced spin flip generates a finite spin current and quantum partition noises in the absence of net charge transport. Moreover, spin shot noise is closely related to the magnetic Rabi frequency and decoherence and would be a sensitive tool to measure them.

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  • Received 19 March 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.066601

©2005 American Physical Society

Authors & Affiliations

Bing Dong1,2, H. L. Cui1,3, and X. L. Lei2

  • 1Department of Physics and Engineering Physics, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
  • 2Department of Physics, Shanghai Jiaotong University, 1954 Huashan Road, Shanghai 200030, China
  • 3School of Optoelectronics Information Science and Technology, Yantai University, Yantai, Shandong, China

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Issue

Vol. 94, Iss. 6 — 18 February 2005

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