UNSPECIFIED (2003) Low density two-dimensional electron systems studied by scanning tunneling spectroscopy. In: Asia-Pacific Surface and Interface Analysis Conference (APSIAC 02), UNIV TOKYO, TOKYO, JAPAN, OCT 01-04, 2002. Published in: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 42 (7B). pp. 4809-4815.

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Abstract

A two-dimensional electron system (2DES) belonging to the InAs conduction band ha's been prepared by depositing tiny amounts of adsorbates on the InAs(I 10) surface. Photoemission has been used to determine the resulting 2DES subband energies. Since the 2DES is close to the surface, it could be probed by low-temperature scanning tunneling spectroscopy. In zero magnetic field we find strong and rather irregular corrugations of the local density of states (LDOS),, which are interpreted as due to the tendency of a 2DES to weakly localize. Applying a magnetic field leads to Landau quantization and to a dramatic change of the LDOS, which is now composed of drift states running along equipotential lines.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Publisher:	INST PURE APPLIED PHYSICS
ISSN:	0021-4922
Date:	July 2003
Volume:	42
Number:	7B
Number of Pages:	7
Page Range:	pp. 4809-4815
Identification Number:	10.1143/JJAP.42.4809
Publication Status:	Published
Title of Event:	Asia-Pacific Surface and Interface Analysis Conference (APSIAC 02)
Location of Event:	UNIV TOKYO, TOKYO, JAPAN
Date(s) of Event:	OCT 01-04, 2002
URI:	http://wrap.warwick.ac.uk/id/eprint/9431

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