TY - JOUR
T1 - Transient current spectroscopy of a quantum dot in the Coulomb blockade regime
AU - Fujisawa, Toshimasa
AU - Tokura, Yasuhiro
AU - Hirayama, Yoshiro
PY - 2001/2/6
Y1 - 2001/2/6
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.63.081304
DO - 10.1103/PhysRevB.63.081304
M3 - Article
AN - SCOPUS:4243917441
VL - 63
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 8
ER -