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Shot noise spectroscopy of electronic spin flips in quantum dots

Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Sergeij I. Kulinich ; Robert I. Shekhter ; Mats Jonson ; V. M. Vinokur
Applied Physics Letters (0003-6951). Vol. 90 (2007), 19, p. 192105 .
[Artikel, refereegranskad vetenskaplig]

Spin decoherence and spin flips crucially affect the tunneling transport of spin-polarized electrons through a quantum dot connected to magnetic leads. Here, the authors show that the low-frequency shot noise in such structures diverges as the spin relaxation rate for electrons on the dot goes to zero, reaching giant super-Poissonian values for realistic spin-flip rates. It is also shown that combined measurements of the average current and the shot noise as a function of bias voltage and external magnetic field offer a spectroscopic tool for studying electronic spin relaxation rates in this system.

Denna post skapades 2007-10-23. Senast ändrad 2008-02-07.
CPL Pubid: 56730


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