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Giant shot noise due to mechanical transportation of spin-polarized electrons

Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Sergeij I. Kulinich ; Robert I. Shekhter ; Mats Jonson ; V. M. Vinokur
Physical Review B (1098-0121). Vol. 77 (2008), 17, p. 174304.
[Artikel, refereegranskad vetenskaplig]

We show that single-electron "shuttling" of electrons in a magnetic nanoelectromechanical single-electron transistor device can be an efficient tool for studying electron spin-flip relaxation on quantum dots. The reason is traced to a spin blockade of the mechanically aided shuttle current that occurs in devices with highly polarized and collinearly magnetized leads. This results in giant peaks in the shot-noise spectral function, wherein the peak heights are only limited by the rate of electronic spin flips. Therefore, we show that nanomechanical spectroscopy of the spin-flip rate is possible, allowing spin-flip relaxation times as long as 10 mu s to be detected.



Denna post skapades 2008-07-14. Senast ändrad 2009-12-15.
CPL Pubid: 72444

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)
Institutionen för fysik (GU) (GU)

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Mesoskopisk fysik

Chalmers infrastruktur