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Titolo:
Metal-insulator transition in 2D: resistance in the critical region
Autore:
Altshuler, BL; Maslov, DL; Pudalov, VM;
Indirizzi:
PN Lebedev Phys Inst, Moscow 117924, Russia PN Lebedev Phys Inst Moscow Russia 117924 ys Inst, Moscow 117924, Russia NEC Res Inst, Princeton, NJ 08540 USA NEC Res Inst Princeton NJ USA 08540NEC Res Inst, Princeton, NJ 08540 USA Princeton Univ, Dept Phys, Princeton, NJ 08544 USA Princeton Univ Princeton NJ USA 08544 Dept Phys, Princeton, NJ 08544 USA Univ Florida, Dept Phys, Gainesville, FL 32611 USA Univ Florida Gainesville FL USA 32611 ept Phys, Gainesville, FL 32611 USA
Titolo Testata:
PHYSICA E
fascicolo: 2, volume: 9, anno: 2001,
pagine: 209 - 225
SICI:
1386-9477(200102)9:2<209:MTI2RI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-TEMPERATURE RESISTIVITY; DIMENSIONAL ELECTRON-GAS; SI-MOS STRUCTURES; GATED SEMICONDUCTORS; DISORDERED-SYSTEMS; MAGNETIC-FIELD; 2-DIMENSIONAL SYSTEM; COULOMB INTERACTION; WEAK-LOCALIZATION; INVERSION-LAYERS;
Keywords:
metal-insulator transition; two-dimensional carrier system;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
75
Recensione:
Indirizzi per estratti:
Indirizzo: Pudalov, VM PN Lebedev Phys Inst, Leninsky Prospect 53, Moscow 117924, Russia PN Lebedev Phys Inst Leninsky Prospect 53 Moscow Russia 117924
Citazione:
B.L. Altshuler et al., "Metal-insulator transition in 2D: resistance in the critical region", PHYSICA E, 9(2), 2001, pp. 209-225

Abstract

The goal of this paper is to highlight several issues which are most crucial for the understanding of the "metal-insulator transition" in two dimensions. We discuss some common problems in interpreting experimental results on high-mobility Si MOSFETs. We analyze concepts and methods used to determine the critical density of electrons at the metal-insulator transition. In particular, we discuss the origin of the temperature dependence of the resistivity and reasons for this dependence to flatten out at some electron density in the vicinity of the metal-insulator transition. This flattening hasrecently been proposed to indicate a true quantum phase transition. We suggest an alternative interpretation of this result and demonstrate the consistency of our proposition with the experimental data. One of the main questions. which arise in connection with the transition, is whether or not the metallic state is qualitatively distinct from a conventional disordered Fermi liquid. We analyze the arguments in favor of both affirmative and negative answers to this question and conclude that the experimental results accumulated up-to-date do not provide convincing evidence for the new state of matter characterized by a metallic-like residual conductivity. We also discuss in details the measurement and control of the electron temperature; these issues are crucial for interpreting the low-temperature experimental data. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 27/09/20 alle ore 13:41:20