We calculate the spin-Hall conductivity for a two-dimensional electron gas within the self-consistent Born approximation, varying the strength and type of disorder. In the weak disorder limit we find both analytically and numerically a vanishing spin-Hall conductivity even when we allow a momentum dependent scattering. Separating the reactive from the dissipative current response, we find the universal value σsHR=e∕8π for the reactive response, which cancels however with the dissipative part σsHD=−e∕8π.
Raimondi, R., Schwab, P. (2005). Spin-Hall effect in a disordered 2D electron system. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 71, 033311-033314 [10.1103/PhysRevB.71.033311].
Spin-Hall effect in a disordered 2D electron system
RAIMONDI, Roberto;
2005-01-01
Abstract
We calculate the spin-Hall conductivity for a two-dimensional electron gas within the self-consistent Born approximation, varying the strength and type of disorder. In the weak disorder limit we find both analytically and numerically a vanishing spin-Hall conductivity even when we allow a momentum dependent scattering. Separating the reactive from the dissipative current response, we find the universal value σsHR=e∕8π for the reactive response, which cancels however with the dissipative part σsHD=−e∕8π.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
