Resonant tunneling through a single level quantum dot attached to ferromagnetic leads with non-collinear magnetizations

• Autorzy: Wawrzyniak M. , Gmitra M. , Barnaś J.
• Języki publikacji: EN

Abstrakty

EN

Resonant tunnelling through a non-interacting single-level quantum dot attached to ferromagnetic leads is analysed theoretically. The magnetic moments of the leads are assumed to be non-collinear. Apart from this, an external magnetic field is applied to the system, which is non-collinear with the magnetizations. The magnetic moments of the leads and the external magnetic field are, however, in a common plane. Basic transport characteristics, including current-voltage curves, differential conductance, and tunnel magnetoresistance associated with magnetization rotation, are calculated using the non-equilibrium Green function technique. The dependence of transport characteristics on the bias voltage has been calculated numerically.

Słowa kluczowe

EN

spin dependent transport; tunnel magnetoresistance; quantum dot

PL

magnetoopór tunelowy; transport zależny od spinu; kropka kwantowa

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 3
• Strony: 695--700
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Wawrzyniak M.

autor

Gmitra M.

autor

Barnaś J.

• Department of Physics, Adam Mickiewicz University, Poznań, Poland,

Bibliografia

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• [4] KÖNIG J., MARTINEK J., Phys. Rev. Lett., 90 (2003), 166602.
• [5] RUDZIŃSKI W., ŚWIRKOWICZ R., BARNAŚ J., WILCZYŃSKI M., J. Magn. Magn. Mater., 294 (2005), 1.
• [6] WEYMANN I., BARNAŚ J., KÖNIG J., MARTINEK J., SCHÖN G., Phys. Rev. B, 72 (2005), 113301.
• [7] PEDERSEN J.N., THOMASSEN J.Q., FLENSBERG K., Phys. Rev. B, 72 (2005), 045341. s.695-700,