Phase Relaxation and Non-Equilibrium Transport Properties through Multilevel Quantum Dot

Yasuhiro Funabashi, Kazuhiko Ohtsubo, Mikio Eto, Kiyoshi Kawamura

Research output: Contribution to journalConference article

7 Citations (Scopus)

Abstract

Phase relaxation of conduction electrons in transport through a multilevel quantum dot in the Coulomb blockade region is studied using the Anderson Hamiltonian. Two types of currents are calculated separately, i.e., in the absence and presence of the phase relaxation. At low temperatures, the current without the phase relaxation is considerably suppressed for an appropriate value of the Coulomb interaction between electrons in the dot. This is due to the interference between two virtual processes in the transport of a electron. At high temperatures, the two types of currents are almost identical as a consequence of the thermal excitations.

Original languageEnglish
Pages (from-to)388-391
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume38
Issue number1 B
DOIs
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1998 International Symposium on Formation, Physics and Device Application of Quantum Dot Structures, QDS-98 - Sapporo, Japan
Duration: 1998 May 311998 Jun 4

Keywords

  • Anderson Hamiltonian
  • Multilevel quantum dot
  • Non-equilibrium transport
  • Phase relaxation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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