Transient current spectroscopy of a quantum dot in the Coulomb blockade regime
- 6 February 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 63 (8) , 081304
- https://doi.org/10.1103/physrevb.63.081304
Abstract
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 nonequilibrium 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 μs.Keywords
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