Phase diagram of electron systems near the superconductor-insulator transition

The zero temperature phase diagram of Cooper pairs exposed to disorder and a magnetic field is determined theoretically from a variational approach. Four distinct phases are found: a Bose and a Fermi insulating, a metallic, and a superconducting phase, respectively. The results explain the giant neg...

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Bibliographic Details
Published inPhysical review letters Vol. 105; no. 26; p. 267001
Main Authors Pokrovsky, V L, Falco, G M, Nattermann, T
Format Journal Article
LanguageEnglish
Published United States 31.12.2010
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Summary:The zero temperature phase diagram of Cooper pairs exposed to disorder and a magnetic field is determined theoretically from a variational approach. Four distinct phases are found: a Bose and a Fermi insulating, a metallic, and a superconducting phase, respectively. The results explain the giant negative magnetoresistance found experimentally in In-O, TiN, Be and high-T(c) materials.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.105.267001