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Titolo:
DENSITY-OF-STATES FOR BAND RANDOM MATRICES WITH ELECTRIC-FIELD
Autore:
LEITNER DM; FEINGOLD M;
Indirizzi:
UNIV HEIDELBERG,NEUENHEIMER FELD 253 W-6900 HEIDELBERG GERMANY BEN GURION UNIV NEGEV,DEPT PHYS IL-84105 BEER SHEVA ISRAEL UNIV CAMBRIDGE,CAVENDISH LAB,CONDENSED MATTER THEORY GRP CAMBRIDGE CAMBS ENGLAND
Titolo Testata:
Journal of physics. A, mathematical and general
fascicolo: 24, volume: 26, anno: 1993,
pagine: 7367 - 7376
SICI:
0305-4470(1993)26:24<7367:DFBRMW>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCALING PROPERTIES; LOCALIZATION; LIQUID;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
D.M. Leitner e M. Feingold, "DENSITY-OF-STATES FOR BAND RANDOM MATRICES WITH ELECTRIC-FIELD", Journal of physics. A, mathematical and general, 26(24), 1993, pp. 7367-7376

Abstract

We present a long-range hopping tight-binding model in which the ensemble averaged density of states, rho(E), undergoes a gradual transition from a homogenous form with almost no variation to strongly peaked behaviour as an external electric field grows. The model consists of N x N band random matrices of bandwidth b. The corresponding matrix elements, h(ij), have all vanishing average except on the diagonal where, (h(ij)) = alpha i. Here, the parameter alpha plays the role of the electric field. We approximate the behaviour of the width, sigma(E ($) over tilde) , of the local density of states, rho(L)(E ($) over tilde) and use it to predict the value of alpha around which the transition iscentred.

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Documento generato il 23/09/20 alle ore 11:07:18