The features of ballistic electron transport in a suspended quantum point contact

Journal Article · Mon May 19 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4878398· OSTI ID:22273382

Budantsev, M. V.; Bakarov, A. K.; Toropov, A. I. ^[1]; Pogosov, A. G. ^[1]; Ishutkin, S. V.; Shesterikov, E. V. ^[2]

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1. Rzhanov Institute of Semiconductor Physics, SB RAS, 630090 Novosibirsk (Russian Federation)
2. Tomsk State University of Control Systems and Radioelectronics, 634050 Tomsk (Russian Federation)

A suspended quantum point contact and the effects of the suspension are investigated by performing identical electrical measurements on the same experimental sample before and after the suspension. In both cases, the sample demonstrates conductance quantization. However, the suspended quantum point contact shows certain features not observed before the suspension, namely, plateaus at the conductance values being non-integer multiples of the conductance quantum, including the “0.7-anomaly.” These features can be attributed to the strengthening of electron-electron interaction because of the electric field confinement within the suspended membrane. Thus, the suspended quantum point contact represents a one-dimensional system with strong electron-electron interaction.

• OSTI ID: 22273382
• Journal Information: Applied Physics Letters, Vol. 104, Issue 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON-ELECTRON INTERACTIONS
ELECTRONS
ONE-DIMENSIONAL CALCULATIONS
QUANTUM MECHANICS