Pumped spin-current and shot noise spectra in a single quantum dot

Details Pumped spin-current and shot noise spectra in a single quantum dot Pumped spin-current and shot noise spectra in a single quantum dot

2004-04-03

arxiv.org/abs/cond-mat/0404064v3

Phys. Rev. Lett. 94, 066601 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, to be published in Phys. Rev. Letter

Scientific paper

10.1103/PhysRevLett.94.066601

We exploit the pumped spin-current and current noise spectra under equilibrium condition 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 atuo- 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 the 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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