Quantum point contacts in a density-tunable two-dimensional electron gas

Sebastien Nuttinck, Katsushi Hashimoto, Sen Miyashita, Tadashi Saku, Yoshihisa Yamamoto, Yoshiro Hirayama

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Quantum point contacts fabricated using a backgated two-dimensional electron-gas system show clear quantized features and a 0.7 anomaly in conductance. Using these density-tunable point contacts, we have studied the behavior of the 0.7 anomaly. The 0.7 step shifts down to around 0.5 as the electron density is decreased under a zero magnetic field. This suggests that electron-electron interactions play an important role in forming the conductance anomalies of quantum point contacts.

Original languageEnglish
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume39
Issue number7 A
Publication statusPublished - 2000 Jul 1
Externally publishedYes

ASJC Scopus subject areas

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

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