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Crossover critical correlation function

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Zeitschrift für Physik B Condensed Matter

Abstract

The anomalous dimension index η assumes its critical value for small momenta and vanishes for large momenta. We provide, in the form of a quadrature, a momentum dependent η(k) which interpolates between the above limits. High- and low-momentum expansions for the spectral function are obtained, leading to a Padé approximant from which η(k) is determined, thereby giving a crossover critical correlation function.

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Author notes

  1. R. A. Ferrell

    Present address: Department of Physics and Astronomy, University of Maryland, 20742, College Park, Maryland, USA

  2. J. K. Bhattacharjee

    Present address: Department of Physics, Indian Institute of Technology, 20816, Kampur, India

Authors and Affiliations

  1. Max-Planck-Institut für Festkörperforschung, Stuttgart, Federal Republic of Germany

    R. A. Ferrell & J. K. Bhattacharjee

  2. Department of Physics and Astronomy, University of Maryland, 20742, College Park, Maryland, USA

    J. K. Bhattacharjee

  3. Institute for Physical Science and Technology, University of Maryland, 20742, College Park, Maryland, USA

    R. A. Ferrell & J. K. Bhattacharjee

  4. Department of Physics, University of California, 93106, Santa Barbara, California, USA

    D. J. Scalapino

Authors
  1. R. A. Ferrell
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  2. J. K. Bhattacharjee
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  3. D. J. Scalapino
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Additional information

Dedicated to B. Mühlschlegel on the occasion of his 60th birthday

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Ferrell, R.A., Bhattacharjee, J.K. & Scalapino, D.J. Crossover critical correlation function. Z. Physik B - Condensed Matter 60, 471–482 (1985). https://doi.org/10.1007/BF01304470

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  • DOI: https://doi.org/10.1007/BF01304470

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