Tunnel structures as probes of new physics [and discussion]

Main, P. C. and Buckle, Philip Derek ORCID: https://orcid.org/0000-0001-9508-7783 1996. Tunnel structures as probes of new physics [and discussion]. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 354 (1717) , pp. 2311-2325. 10.1098/rsta.1996.0102

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Abstract

The use of tunnelling and, in particular, resonant tunnelling devices to study basic physics is reviewed. Three principal areas are discussed. First, the use of tunnelling as an energy spectrometer to determine the energy levels in a quantum well. Specific applications of this include the energy levels of quantum dots and wires and the observation of the quantum mechanical energy levels of a classically chaotic system. Second, the application of a magnetic field perpendicular to the current (magnetotunnelling spectroscopy) introduces a change in k-vector of the tunnelling electron which allows the k dependence of the energy levels to be explored. This has been exploited in determining the dispersion of holes in quantum wells and in mapping the wavefunctions of electrons confined in quantum wires. Finally, it is possible to study tunnelling through localized states which exhibit effects due to electron-electron and electron-hole interactions, a regime which is difficult to investigate by other methods.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	The Royal Society
ISSN:	1364-503X
Last Modified:	19 May 2023 01:41
URI:	https://orca.cardiff.ac.uk/id/eprint/46201

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