Quantum Point Contacts in a Density-Tunable Two-Dimensional Electron Gas
- 1 July 2000
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 39 (7A) , L655
- https://doi.org/10.1143/jjap.39.l655
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.Keywords
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