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Point-contact spectroscopy in arsenic: Classical and quantum-mechanical trajectory effects

โœ Scribed by N.N. Gribov; P. Samuely; J.A. Kokkedee; A.G.M. Jansen; I.K. Yanson; P. Wyder

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
323 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

The electron-phonon interaction has been studied in arsenic by means of point-contact spectroscopy. Two different types of d 2 y /dI2 spectra with positive and negative intensities are observed. While the positive spectra are caused by the classical trajectory effects of the ballistic charge motion through the contact, the inversed spectra are explained in terms of weak localisation. This interpretation is supported by magnetoresistance measurements. point-contact spectra, a good agreement can be found.

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We study the dependence of subband energies of a double quantum point contact on an external magnetic field applied in the transport direction. The comparison with experimental magnetotransport data allows us to identify the conditions for the modulation of anticrossing gaps and to map the subband s