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

Toshimasa Fujisawa, Yasuhiro Tokura, Yoshiro Hirayama

Research output: Contribution to journalArticlepeer-review

110 Citations (Scopus)

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.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number8
DOIs
Publication statusPublished - 2001 Feb 6
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Transient current spectroscopy of a quantum dot in the Coulomb blockade regime'. Together they form a unique fingerprint.

Cite this