The Electrical Properties of Na3Cu4S4, A Mixed-Valence One-Dimensional Metal.

Abstract

Four probe electrical conductivity measurements from 15-300K demonstrate that the mixed-valence compound Na3Cu4S4 is metallic. Measurements on single crystals reveal that the conductivity is highly anisotropic, with enhanced conductivity parallel to the crystal needle axis, corresponding to pseudo one-dimensional (Cu4S4(3-) columns in the structure. For single crystals, resistance increases from 1/15000 ohm cm at 300 K to 1/300,000 ohm cm at 15K. A small, temperature independent magnetic susceptibility is consistent with metallic behavior. Diffuse reflectance spectra support the formulation of this compound as a Class III B mixed-valence S(2-)/S(-) solid.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1981
Accession Number
ADA108517

Entities

People

  • David B. Brown
  • Peter Day
  • Timothy Watt
  • William E. Hatfield
  • Zbigniew Peplinski

Organizations

  • University of Vermont

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • California
  • Chemistry
  • Conductivity
  • Copper
  • Crystals
  • Electrical Conductivity
  • Electrical Properties
  • Energy Bands
  • Inorganic Chemistry
  • Materials
  • Measurement
  • Military Research
  • North Carolina
  • Reflectance
  • Resistance
  • Single Crystals
  • United States

Fields of Study

  • Materials science

Readers

  • Calculus or Mathematical Analysis
  • Marine Ecotoxicology
  • Materials Science and Engineering.