Evolution of pressure-induced heavy fermion state and superconductivity in CeRhIn5: A high-pressure fermi surface study

H. Shishido, R. Settai, S. Araki, T. Ueda, Y. Inada, T. C. Kobayashi, T. Muramatsu, Y. Haga, Y. Onuki

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23 Citations (Scopus)

Abstract

Evolution of the pressure-induced heavy fermion state and superconductivity in CeRhIn5 have been established by high-pressure Fermi surface studies using dHvA technique. The effective mass of the conduction electrons named branch β2 increases from 5.5 m0 at ambient pressure to 20 m0 at 1.6 GPa where superconductivity sets in. This heavy electron mass continues to increase steeply up to 2.1 GPa, 45 m0 at 2.1 GPa, with a concomitant increase of the superconducting transition temperature. However, the underlying Fermi surface remains approximately same even at 2.1 GPa, strongly suggesting that antiferromagnetic fluctuations of Ce moments do not contribute to the volume of the Fermi surface, but enhance the cyclotron mass of the conduction electrons.

Original languageEnglish
Article number214510
Pages (from-to)2145101-2145105
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number21
Publication statusPublished - Dec 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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