Non-Fermi liquid behavior for U ions in cubic crystals

Mikito Koga, Gergely Zarand, Daniel L. Cox

Research output: Contribution to journalConference article

Abstract

Various non-Fermi liquid (NFL) scenarios are studied using renormalization group methods for a nominally tetravalent (5f2) U ion in a cubic environment. Using an Anderson model, we find a small energy scale characterizing a crossover from an ionic spectrum to a NFL excitation spectrum, even in the mixed-valence regime. This scale is connected to the competition of two NFL fixed points (FPs): A two-channel Kondo FP dominated by a quadrupolar f2 doublet, and a novel FP dominated by an f2 triplet. For the latter, which may be relevant for uranium alloys like UxY1-xPd3 and UCu5-xPdx, a quadrupolar exchange interaction gives rise to an intermediate temperature power law dependence (approximately T-0.4) in the magnetic susceptibility.

Original languageEnglish
Pages (from-to)402-403
Number of pages2
JournalPhysica B: Condensed Matter
Volume281-282
DOIs
Publication statusPublished - Jun 1 2000
EventYamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Jpn
Duration: Aug 24 1999Aug 28 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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