Voltage control of electron-nuclear spin correlation time in a single quantum dot Article - Août 2013

J. Nilsson, Louis Bouet, J. Bennett, Thierry Amand, R. Stevenson, I. Farrer, A. Ritchie, S. Kunz, Xavier Marie, J. Shields, B. Urbaszek

J. Nilsson, Louis Bouet, J. Bennett, Thierry Amand, R. Stevenson, I. Farrer, A. Ritchie, S. Kunz, Xavier Marie, J. Shields, B. Urbaszek, « Voltage control of electron-nuclear spin correlation time in a single quantum dot  », Physical Review B : Condensed Matter and Materials Physics (1998-2015), août 2013. ISSN 1098-0121

Abstract

We demonstrate bias control of the efficiency of the hyperfine coupling between a single electron in an InAs quantum dot and the surrounding nuclear spins monitored through the positively charged exciton X+ emission. In applied longitudinal magnetic fields, we vary simultaneously the correlation time of the hyperfine interaction and the nuclear spin relaxation time and thereby the amplitude of the achieved dynamic nuclear polarization under optical pumping conditions. In applied transverse magnetic fields, a change in the applied bias allows a switch from the anomalous Hanle effect to the standard electron spin depolarization curves.

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