Vanishingly small Maki-Thompson superconducting fluctuation in the magnetoresistance of high superconductors

Kouichi Semba, Azusa Matsuda

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The magnetoresistance (MR) of high-(Formula presented) cuprate superconductors (HTSCșs) is studied. We have shown that the Zeeman term of the Maki-Thompson (MT) process could not be detected in the longitudinal MR of 90 K YBCO crystals. We show here that the MT process is thought to be also negligible in the transverse MR of 90 K and Zn-doped YBCO crystals. The MR, which has been assigned previously to a MT-orbital process, is more naturally understood as normal-state orbital MR that is proportional to the square of the Hall angle. We conclude that the MT-fluctuation is vanishingly small, at least above (Formula presented), in these HTSCșs. In addition to the Hall measurements, MR measurements also support the hypothesis of two distinct relaxation times in HTSCșs.

Original languageEnglish
Pages (from-to)11103-11106
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number17
DOIs
Publication statusPublished - 1997 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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