Temperature dependent tunneling spectroscopy in the heavy fermion CeRu 2Si 2 and in the antiferromagnet CeRh 2Si 2

A. Maldonado, H. Suderow, S. Vieira, D. Aoki, J. Flouquet

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4 Citations (Scopus)

Abstract

CeRu 2Si 2 and CeRh 2Si 2 are two similar heavy fermion stoichiometric compounds located on the two sides of a magnetic quantum critical phase transition. CeRh 2Si 2 is an antiferromagnet below T N=36K with moderate electronic masses whereas CeRu 2Si 2 is a paramagnetic metal with particularly heavy electrons. Here we present tunneling spectroscopy measurements as a function of temperature (from 0.15 to 45K). The tunneling conductance at 0.15K reveals V-shaped dips around the Fermi level in both compounds, which disappear in CeRu 2Si 2 above the coherence temperature, and in CeRh 2Si 2 above the Néel temperature. In the latter case, two different kinds of V-shaped tunneling conductance dips are found.

Original languageEnglish
Article number475602
JournalJournal of Physics Condensed Matter
Volume24
Issue number47
DOIs
Publication statusPublished - 2012 Nov 28
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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