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A model for the diamagnetic anomaly in CuCl

  • T. C. Collins
  • A. B. Kunz
  • R. S. Weidman
II. Theoretical Approaches for Ordered Systems
Part of the Lecture Notes in Physics book series (LNP, volume 113)

Abstract

A self-consistent study of energy bands and defect and imputity levels in CuCl have been performed as a function of hydrostatic pressure and/or uniaxial distorsion. These studies are performed using a self-consistent Hartree-Fock technique plus correlation method. The principal results are that the upper valence band is mostly Cu 3d in origin, and that for the normal lattice constant the band gap is direct at Λ and of about 4 eV magnitude. Under uniaxial stress or hydrostatic pressure a weak indirect gap may be generated but of insufficient size to support Abrikosov's hypothesis We find that defects or impurities produce electron states near the conduction band. The role of these electrons is to interact with the exciton field and produce Cooper pairs. This interaction cuts off.when the density of free carriers is large enough to screen the exciton field.

Keywords

Conduction Band Valence Band Band Structure Cooper Pair Uniaxial Stress 
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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • T. C. Collins
    • 1
  • A. B. Kunz
    • 2
  • R. S. Weidman
    • 2
  1. 1.Air Force Office of Scientific ResearchBolling A.F.B.USA
  2. 2.Department of Physics and Materials Research LaboratoryUniversity of Illinois at UrbanaChampaignUSA

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