Anomalous transport phenomena in CeCoIn5 close to quantum critical point

S. Onari, H. Kontani, Y. Tanaka

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Abstract

Various transport coefficients show striking deviations from conventional Fermi-liquid behaviors in many electron systems which are close to antiferromagnetic (AF) quantum critical points (QCP). For example, Hall coefficients and Nernst coefficients in three-dimensional heavy fermion CeCoIn5 and CeCu6 - x Aux increase remarkably at low temperatures. These temperature dependences are too strong to explain in terms of the relaxation time approximation. To elucidate the origin of these anomalous transport phenomena in three-dimensional systems, we study the role of current vertex corrections (CVC) based on the fluctuation exchange (FLEX) approximation. We find that the Hall coefficient and the Nernst coefficient strongly increase due to the CVC in the vicinity of the AF QCP, even in three-dimensional systems.

Original languageEnglish
Pages (from-to)359-361
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 1
DOIs
Publication statusPublished - Mar 2007
Externally publishedYes

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Keywords

  • CeCoIn
  • Hall coefficient
  • Nernst coefficient
  • Vertex corrections

ASJC Scopus subject areas

  • Condensed Matter Physics

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