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Transient current spectroscopy of a quantum dot in the Coulomb blockade regime by Fujisawa, Toshimasa; Tokura, Yasuhiro; Hirayama, Yoshiro is a scholarly article available to read on EtoBox.

What is Transient current spectroscopy of a quantum dot in the Coulomb blockade regime about?

Transient current spectroscopy is proposed and demonstrated in order to investigate the energy relaxation inside a quantum dot in the Coulomb blockade regime. We employ a fast pulse signal to excite an AlGaAs/GaAs quantum dot to an excited state, and analyze the non-equilibrium transient current as a function of the pulse length. The amplitude and time-constant of the transient current are sensitive to the ground and excited spin states. We find that the spin relaxation time is longer than, at least, a few microsecond.

Author

Fujisawa, Toshimasa; Tokura, Yasuhiro; Hirayama, Yoshiro

Published

2000

Language

EN