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Pairing in Anderson Model

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Theoretical and Experimental Aspects of Valence Fluctuations and Heavy Fermions

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Abstract

The system of magnetic impurities in metals1 and allied systems of mixed valence2 and heavy fermions3 have recently become subjects of active interest to physicists. Perturbation theoretic Green functional analysis predicts4,5 a linear behaviour of the specific heat of the impurities at low temperature. Experimental results6 for CuCr, on the other hand, shows a Schottky-type behaviour. In an earlier work7 we have obtained Cd ~ (1/T2) exp − α/T for the low temperature specific heat of the impurities. This behaviour points to a BCS type correlation of electrons in the impurity states, which we have investigated here. We have obtained some criteria when correlation can exist.

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References

  1. G. Gruener and A. Zawadowski, in Progress in low temperature physics, vol VII B, D.F. Brewer, Ed., North-Holland, Amsterdam, 1978.

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  2. D.I. Khomskii, in Quantum theory of solids, I.M. Lifshits, Ed, MIR publishers, Moscow, 1982.

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  3. F. Steglich, in Theory of heavy fermions and valence fluctuations, T. Kasuya and T. Saso, Eds., Springer, Berlin, 1985.

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  7. G. Debnath and P. Rudra, Phys. Rev. B 33: 3885 (1986).

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Author information

Authors and Affiliations

  1. Department of Physics, University of Kalyani, 741 235, Kalyani, West Bengal, India

    P. Rudra

Authors
  1. P. Rudra
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Editor information

Editors and Affiliations

  1. Tata Institute of Fundamental Research, Bombay, India

    L. C. Gupta  & S. K. Malik  & 

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© 1987 Plenum Press, New York

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Rudra, P. (1987). Pairing in Anderson Model. In: Gupta, L.C., Malik, S.K. (eds) Theoretical and Experimental Aspects of Valence Fluctuations and Heavy Fermions. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0947-5_84

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  • DOI: https://doi.org/10.1007/978-1-4613-0947-5_84

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4612-8259-4

  • Online ISBN: 978-1-4613-0947-5

  • eBook Packages: Springer Book Archive

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