Spin-dependent energy relaxation inside a quantum dot

Toshimasa Fujisawa, Yasuhiro Tokura, David G. Austing, Yoshiro Hirayama, Seigo Tarucha

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We employ pulse excitation measurements in order to investigate spin-dependent energy relaxation inside a quantum dot. A fast pulse signal is applied to a gate electrode in order to excite a quantum dot, and the induced transient current is analyzed in terms of energy relaxation. We describe transient current measurements on a lateral quantum dot, in which the tunneling rates are controllable with gate voltages, and on a vertical quantum dot, in which the total number of electrons and total spin can be well identified. The spin-conservation rule during energy relaxation is clearly identified.

Original languageEnglish
Pages (from-to)224-229
Number of pages6
JournalPhysica B: Condensed Matter
Issue number1-4
Publication statusPublished - 2002 Mar


  • Coulomb blockade
  • Electron spin
  • Energy relaxation
  • Quantum dot


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