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Titolo:
Millimeter wave and DC investigations of spin effects in the 2DES of AlGaAs/GaAs
Autore:
Meisels, R; Dybko, K; Ziouzia, F; Kuchar, F; Deutschmann, R; Abstreiter, G; Hein, G; Pierz, K;
Indirizzi:
Univ Min & Met Leoben, Inst Phys, A-8700 Leoben, Austria Univ Min & Met Leoben Leoben Austria A-8700 Phys, A-8700 Leoben, Austria Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany Tech Univ Munich Garching Germany D-85748 nst, D-85748 Garching, Germany Phys Tech Bundesanstalt, D-38023 Braunschweig, Germany Phys Tech Bundesanstalt Braunschweig Germany D-38023 aunschweig, Germany
Titolo Testata:
PHYSICA E
fascicolo: 1-3, volume: 10, anno: 2001,
pagine: 57 - 61
SICI:
1386-9477(200105)10:1-3<57:MWADIO>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEGENERATE LANDAU-LEVELS; ELECTRON-STATES; HETEROSTRUCTURES;
Keywords:
quantum Hall effect; electron spin resonance; GaAs/GaAlAs heterostructure; two-dimensional electron system;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Kuchar, F Univ Min & Met Leoben, Inst Phys, Franz Josef Str 18, A-8700 Leoben, Austria Univ Min & Met Leoben Franz Josef Str 18 Leoben Austria A-8700
Citazione:
R. Meisels et al., "Millimeter wave and DC investigations of spin effects in the 2DES of AlGaAs/GaAs", PHYSICA E, 10(1-3), 2001, pp. 57-61

Abstract

The spin properties of the 2DES in AlGaAs/GaAs heterostructures are studied via the electron spin resonance (ESR) of conduction electrons and via thetemperature dependence of the DC-sigma (xx)(B) conductivity component. TheESR is investigated at integer (v = 1) and fractional filling factors (v <1) via the change DeltaR(xx) of the magnetoresistance in high- and low-mobility samples. The DC-sigma (xx)(B) peaks in the integer quantum Hall effect regime show scaling behaviour. The peak widths obey power laws with exponents of about 0.4 (strong spin splitting) and 0.2 (no spin splitting, one critical energy in the Landau level centre). By assuming two critical energies in the latter case we obtain exponents close to 0.4. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 13/07/20 alle ore 09:21:37