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High-pressure study of the non-Fermi liquid material U_2Pt_2In | | P. Estrela
; A. de Visser
; T. Naka
; F.R. de Boer
; L.C.J. Pereira
; | | Date: |
21 Sep 2000 | | Journal: | Eur. Phys. J. B 23 (2001) 449-454 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | The effect of hydrostatic pressure (p<= 1.8 GPa) on the non-Fermi liquid state of U_2Pt_2In is investigated by electrical resistivity measurements in the temperature interval 0.3-300 K. The experiments were carried out on single-crystals with the current along (I||c) and perpendicular (I||a) to the tetragonal axis. The pressure effect is strongly current-direction dependent. For I||a we observe a rapid recovery of the Fermi-liquid T^2-term with pressure. The low-temperature resistivity can be analysed satisfactorily within the magnetotransport theory of Rosch, which provides strong evidence for the location of U_2Pt_2In at an antiferromagnetic quantum critical point. For I||c the resistivity increases under pressure, indicating the enhancement of an additional scattering mechanism. In addition, we have measured the pressure dependence of the antiferromagnetic ordering temperature (T_N= 37.6 K) of the related compound U_2Pd_2In. A simple Doniach-type diagram for U_2Pt_2In and U_2Pd_2In under pressure is presented. | | Source: | arXiv, cond-mat/0009324 | | Services: | Forum | Review | PDF | Favorites | |
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