Year: 2001
Type: article
Abstract: We studied the electronic state of UGa 3 by measuring the electrical resistivity under pressure. When pressure is applied to UGa 3 , the Néel temperature T N = 67 K decreases steeply and becomes zero around 2.6 GPa. Correspondingly, the coefficient A in the electrical resistivity ρ = ρ 0 + AT 2 , 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 ρ 0 has a maximum.
Authors: M Nakashima, Y Haga, F Honda, T Eto, G Oomi, T Kagayama, N Takeshita, T Nakanishi, N Môri, D Aoki, R Settai, Y Onuki
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2019872864