Phase diagram of electron systems near the superconductor-insulator transition |
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Authors: | Pokrovsky V L Falco G M Nattermann T |
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Institution: | Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA. |
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Abstract: | 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. |
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