Pre-formed superconducting and quadrupolar fluctuations and heavy electron mass in an exactly solvable model |
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| Authors: | Email author" target="_blank">A?A?ZvyaginEmail author |
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| Institution: | (1) Institute of Theoretical Physics, Chalmers University of Technology and Göteborg University, 412 96 Göteborg, Sweden;(2) B.I. Verkin Institute for Low Temperature Physics and Engineering, The NAS of Ukraine, 61103 Kharkov, Ukraine |
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| Abstract: | We present the Bethe ansatz solution for the two-channel non-magnetic hybridization impurity model of electrons with spin and orbital degrees of freedom. It is shown that a small concentration of such impurities enhances the effective mass of electrons. A large concentration of impurities results in a pre-formation of superconducting and quadrupolar-order fluctuations and in the co-existence of them for some range of parameters.Received: 26 June 2003, Published online: 11 August 2003PACS:
75.30.Mb Valence fluctuation, Kondo lattice, and heavy-fermion phenomena -
71.27.+a Strongly correlated electron systems; heavy fermions |
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