Resonance phenomenon in double-bend-point contact structures

Autor:	Andreas Weisshaar, Martin N. Wybourne, Jong C. Wu, Stephen M. Goodnick
Rok vydání:	1992
Předmět:	Elastic scattering Physics Condensed matter physics Scattering Magnetism Quantum wire Conductance Electron Conductance quantum Magnetic field
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.137661
Popis:	Quantum wires with double bend discontinuities have been fabricated in modulation-doped field-effect transistors. The low temperature conductance shows resonant peaks in the lowest quantized conductance plateau. The double bend constitutes an electron cavity where the number of peaks is directly related to the cavity length. This view is supported by comparison to the theoretical conductance calculated from a generalized mode-matching theory. The experimental peak conductivity decreases with cavity length, which is consistent with elastic scattering due to random disorder in the quantum wire. Magnetic field studies show quenching of the resonance structure when the cyclotron radius approaches the one-dimensional channel width.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Databáze:	OpenAIRE
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