Charge Density Waves in the Mixed-Valence Two-Dimensional Metal, K3Cu8S6.

Abstract

The synthetic conditions for the preparation of KCu4S3, K3Cu8S6, and KCu3S2 have been carefully defined. K3Cu8S6 is apparently a kinetic phase and must be trapped with a minimum amount of either KCu4S3 or KCu3S2. Magnetic susceptibility and electrical resistivity data display behavior typical of CDW systems. In view of the low-dimensional metallic nature of K3Cu8S6 and preliminary X-ray data, a second order reversible transition at T sub 1 = 152 + or - lK has been identified as the onset of an incommensurate lattice. In the region of 50-60K, a first order transition with considerable hysteresis seems to be a structural transition to a commensurate superlattice state.

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Document Details

Document Type
Technical Report
Publication Date
Jan 07, 1987
Accession Number
ADA176054

Entities

People

  • F. J. Di Salvo
  • H. E. Bair
  • J. V. Waszczak
  • L. W. Ter Haar
  • R. M. Fleming

Organizations

  • University of North Carolina at Chapel Hill

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Charge Density
  • Chemistry
  • Copper
  • Crystal Structure
  • Data Displays
  • Diffraction
  • Materials
  • Metals
  • Military Research
  • New York
  • North Carolina
  • Phase Transformations
  • Physical Properties
  • Single Crystals
  • Specific Heat
  • Two Dimensional
  • X-Ray Diffraction

Readers

  • Materials Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Superconducting Magnet Technology