EFFECTIVE-MASS ANISOTROPY AND MANY-BODY EFFECTS IN 2D GAAS (GA,AL)AS HOLE GASES OBSERVED IN VERY HIGH MAGNETIC-FIELDS - COMPARISON OF THEORY AND EXPERIMENT/

Authors
COLE BE HILL SO IMANAKA Y SHIMAMOTO Y BATTY W SINGLETON J CHAMBERLAIN JM MIURA N HENINI M CHENG T
Citation
Be. Cole et al., EFFECTIVE-MASS ANISOTROPY AND MANY-BODY EFFECTS IN 2D GAAS (GA,AL)AS HOLE GASES OBSERVED IN VERY HIGH MAGNETIC-FIELDS - COMPARISON OF THEORY AND EXPERIMENT/, Surface science, 362(1-3), 1996, pp. 464-467
Citations number
10
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
362
Issue
1-3
Year of publication
1996
Pages
464 - 467
Database
ISI
SICI code
0039-6028(1996)362:1-3<464:EAAMEI>2.0.ZU;2-U
Abstract
The effective masses of two-dimensional GaAs/((Ga,Al)As hole systems g roup with (100), (311)B, (211)B, (111)B and (110) substrate orientatio ns have been measured in magnetic fields of up to 80 T. The measured a nisotropy is discussed in terms of bulk effects using a newly develope d theory, Low energy (millimetre wave) cyclotron resonance absorptions show a 15% shift to higher fields in the temperature range 1.4 to 4.2 K over two orders of magnitude of energy. Many-body effects are used t o discuss this observation.