Non-fermi-liquid behaviour around the magnetic quantum critical point in UGa3

M. Nakashima, Y. Haga, F. Honda, T. Eto, G. Oomi, T. Kagayama, N. Takeshita, T. Nakanishi, N. Mri, D. Aoki, R. Settai, Y. Onuki

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We studied the electronic state of UGa3 by measuring the electrical resistivity under pressure. When pressure is applied to UGa3, the Néel temperature TN = 67 K decreases steeply and becomes zero around 2.6 GPa. Correspondingly, the coefficient A in the electrical resistivity ρ = ρ0 + AT2, which is characteristic for Fermi liquid, increases steeply with increasing pressure. Around a magnetic quantum critical point of 2.6 GPa, a non-Fermi-liquid behaviour is found, showing a linear T-dependence of the resistivity, although the Fermi-liquid behaviour recovers above 4 GPa and the A-value decreases with increasing pressure. Furthermore, a resistivity drop, which might be related to superconductivity, was found below 0.3 K at 1.5 GPa, where the residual resistivity ρ0 has a maximum.

Original languageEnglish
Pages (from-to)L569-L576
JournalJournal of Physics Condensed Matter
Issue number24
Publication statusPublished - Jun 18 2001

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics


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