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 journalArticlepeer-review

39 Citations (Scopus)


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
Pages (from-to)L655-L657
JournalJapanese Journal of Applied Physics
Issue number7 A
Publication statusPublished - 2000


Dive into the research topics of 'Quantum point contacts in a density-tunable two-dimensional electron gas'. Together they form a unique fingerprint.

Cite this