Transient current spectroscopy of a quantum dot in the Coulomb blockade regime

Toshimasa Fujisawa, Yasuhiro Tokura, Yoshiro Hirayama

研究成果: Article査読

113 被引用数 (Scopus)

抄録

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.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
63
8
DOI
出版ステータスPublished - 2001 2 6
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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