Thermoelectric power in a single-crystalline CeIrSi3

Yoshinao Takaesu, Naofumi Aso, Yuuki Tamaki, Masato Hedo, Takao Nakama, Kiyoharu Uchima, Hiroki Iida, Noriaki Kimura, Haruyoshi Aoki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The thermoelectric power S and the electrical resistivity ρ of a single-crystalline CeIrSi3 with the non-centrosymmetric tetragonal crystal structure were measured under pressure up to 2.72 GPa in the temperature range from 1.5 K to 300 K. The electronic state of CeIrSi3 is turned from the antiferromagnetic state to superconducting state as a function of pressure. S exhibits a large positive value up to about 52 μV/K, which is characteristic of heavy-fermion systems. S shows a maximum in its temperature dependence due to the Kondo effect and its maximum temperature T S, max gradually moves to higher temperatures from about 100 K (at ambient pressure) to about 120 K (at 2.72 GPa) by applying the pressure. We also observed the antiferromagnetic transition as the kink in the temperature dependence of S at pressure up to 2.12 GPa.

Original languageEnglish
Article numberSA068
Journaljournal of the physical society of japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - 2011 Jul

Keywords

  • CeIrSi
  • Heavy fermion
  • High pressure
  • Non-centrosymmetric superconductor
  • Quantum critical point
  • Thermoelectric power
  • Unconventional superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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