Observation of giant Hall effect in non-magnetic cermets

Xixiang Zhang*, H. Liu, A. B. Pakhomov

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations

Abstract

We study the Hall coefficient over a wide temperature range in co-sputtered Cu:SiO2 samples with metal volume fraction in the range of 0.45≤x≤0.8. With decreasing metal volume fraction x, the samples change from metal to insulator and the Hall coefficient R increases drastically. A maximum has been observed at x = 0.51, which is approximately 700 times larger than that at x = 0.8. This enhancement far exceeds the factor of 20, which can be derived from the classical percolation (finite size scaling) theory. Based on these observations, we conclude that the non-magnetic GHE arises most probably from quantum interference effects on the mesoscopic scale.

Original languageEnglish (US)
Pages (from-to)81-83
Number of pages3
JournalPhysica B: Condensed Matter
Volume279
Issue number1-3
DOIs
StatePublished - Jan 1 2000
EventThe 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) - Kowloon Tong, Hong Kong
Duration: Jun 21 1999Jun 25 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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