Details of sample dependence and transport properties of URu 2Si2

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

doi:10.1143/JPSJ.80.114710

Details of sample dependence and transport properties of URu ₂Si₂

Tatsuma D. Matsuda, Elena Hassinger, Dai Aoki, Valentin Taufour, Georg Knebel, Naoyuki Tateiwa, Etsuji Yamamoto, Yoshinori Haga, Yoshichika Onuki, Zachary Fisk, Jacques Flouquet

IMR - Materials Processing and Characterization Division

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45 Citations (Scopus)

Abstract

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 T² 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 T2 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.

Original language	English
Article number	114710
Journal	Journal of the Physical Society of Japan
Volume	80
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.80.114710
Publication status	Published - 2011 Nov

Keywords

Hidden order
Resistivity
Specific heat
Superconductivity
URu Si

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10.1143/JPSJ.80.114710

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abstract = "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 (TSC) 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 T2 dependence above TSC, indicating that the Fermi liquid regime is restricted to low temperatures. However, an analysis of the isothermal longitudinal magnetoresistivity points out that the T2 dependence may be {"}spoiled{"} by residual inhomogeneous superconducting contribution. We discuss a possible scenario concerning the distribution of TSC related with the fact that the hidden order phase is very sensitive to the pressure inhomogeneity.",

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T1 - Details of sample dependence and transport properties of URu 2Si2

AU - Matsuda, Tatsuma D.

AU - Hassinger, Elena

AU - Aoki, Dai

AU - Taufour, Valentin

AU - Knebel, Georg

AU - Tateiwa, Naoyuki

AU - Yamamoto, Etsuji

AU - Haga, Yoshinori

AU - Onuki, Yoshichika

AU - Fisk, Zachary

AU - Flouquet, Jacques

PY - 2011/11

Y1 - 2011/11

N2 - 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 (TSC) 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 T2 dependence above TSC, indicating that the Fermi liquid regime is restricted to low temperatures. However, an analysis of the isothermal longitudinal magnetoresistivity points out that the T2 dependence may be "spoiled" by residual inhomogeneous superconducting contribution. We discuss a possible scenario concerning the distribution of TSC related with the fact that the hidden order phase is very sensitive to the pressure inhomogeneity.

AB - 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 (TSC) 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 T2 dependence above TSC, indicating that the Fermi liquid regime is restricted to low temperatures. However, an analysis of the isothermal longitudinal magnetoresistivity points out that the T2 dependence may be "spoiled" by residual inhomogeneous superconducting contribution. We discuss a possible scenario concerning the distribution of TSC related with the fact that the hidden order phase is very sensitive to the pressure inhomogeneity.

KW - Hidden order

KW - Resistivity

KW - Specific heat

KW - Superconductivity

KW - URu Si

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Details of sample dependence and transport properties of URu ₂Si₂

Abstract

Keywords

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