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Titolo:
Scaling in fractional quantum Hall transitions
Autore:
Machida, T; Ishizuka, S; Komiyama, S; Muraki, K; Hirayama, Y;
Indirizzi:
Univ Tokyo, Dept Basic Sci, Komiyama Grp, Meguro Ku, Tokyo 1538902, Japan Univ Tokyo Tokyo Japan 1538902 yama Grp, Meguro Ku, Tokyo 1538902, Japan Japan Sci & Technol Corp, CREST, Meguro Ku, Tokyo 1538902, Japan Japan Sci& Technol Corp Tokyo Japan 1538902 ro Ku, Tokyo 1538902, Japan NTT, Basic Res Labs, Atsugi, Kanagawa 2430198, Japan NTT Atsugi Kanagawa Japan 2430198 s Labs, Atsugi, Kanagawa 2430198, Japan
Titolo Testata:
PHYSICA B
fascicolo: 1-4, volume: 298, anno: 2001,
pagine: 182 - 186
SICI:
0921-4526(200104)298:1-4<182:SIFQHT>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-INSULATOR-TRANSITION; HETEROSTRUCTURES; TRANSPORT; PLATEAUS;
Keywords:
fractional quantum Hall effect; inelastic-scattering length; scaling;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Machida, T Univ Tokyo, Dept Basic Sci, Komiyama Grp, Meguro Ku, Komaba 3-8-1-16-622, Tokyo 1538902, Japan Univ Tokyo Komaba 3-8-1-16-622 Tokyo Japan1538902 8902, Japan
Citazione:
T. Machida et al., "Scaling in fractional quantum Hall transitions", PHYSICA B, 298(1-4), 2001, pp. 182-186

Abstract

The transition between fractional quantum Hall (FQH) plateaus, v =2/3 <----> 3/5 , is studied in Al0.3Ga0.7As/GaAs two-dimensional electron-gas systems. The transition width is independent of the sample-size at elevated temperatures T > 80mK, and decreases with decreasing T. With decreasing T below80mK, the transition width splits into sample-specific values. The sample-size dependence indicates that the inelastic-scattering length (L-in) in FQH regime increases to become comparable to the size of conductor (of the order of 10 mum). We derive the absolute size of L-in as a function of T in FQH regime. We find surprising similarity of the scaling behavior in FQH transition to that in the earlier studied integer quantum Hall transitions. (C) 2001 Elsevier Science B.V. AII rights reserved.

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Documento generato il 18/09/20 alle ore 18:29:31