Details of Sample Dependence and Transport Properties of URu2Si2

作者：Matsuda Tatsuma D^*; Hassinger Elena; Aoki Dai; Taufour Valentin; Knebel Georg; Tateiwa Naoyuki; Yamamoto Etsuji; Haga Yoshinori; Onuki Yoshichika; Fisk Zachary; Flouquet Jacques

来源：Journal of the Physical Society of Japan, 2011, 80(11): 114710.

DOI：10.1143/JPSJ.80.114710

• resistivity
• specific heat
• superconductivity
• hidden order
• URu2Si2

Resistivity and specific heat measurements were performed in the low carrier unconventional superconductor URu2Si2 on various samples with very different qualities. The superconducting transition temperature (T-SC) and the hidden order transition temperature (T-HO) of these crystals were evaluated as a function of the residual resistivity ratio (RRR). In high quality single crystals the resistivity does not seem to follow a T-2 dependence above T-SC, indicating that the Fermi liquid regime is restricted to low temperatures. However, an analysis of the isothermal longitudinal magnetoresistivity points out that the T-2 dependence may be "spoiled" by residual inhomogeneous superconducting contribution. We discuss a possible scenario concerning the distribution of T-SC related with the fact that the hidden order phase is very sensitive to the pressure inhomogeneity.

• 出版日期2011-11
• 单位中国地震局