Low Temperature Specific heat of U_{2}PtC_{2}

Roman Movshovich; Franziska Weickert; Eric D. Bauer; J. Thompson; Ni Ni; Filip Ronning

Low Temperature Specific heat of U$_{2}$PtC$_{2}$

ORAL

Abstract

We present specific heat data of the moderately heavy superconductor U$_{2}$PtC$_{2}$ with T$_{\mathrm{c}} =$ 1.34 K, and normal state Sommerfeld coefficient $\gamma =$ C/T $\approx $ 150 mJ/mol K$^{2}$, at temperatures down to below 100 mK and in fields up to 9 T, exceeding the superconducting critical field. Zero-field data show systematic deviation from the weak-coupling BCS fit, with excess contribution at low temperature. The field evolution of the residual $\gamma _{0}$(T$=$0) shows $\surd $H dependence for H \textless 1 T. Together, these results suggest an unconventional nature of superconductivity in this compound.

March 5, 2014, 1:39 PM – March 5, 2014, 1:51 PM

Authors

Roman Movshovich
- Los Alamos National Laboratory
Franziska Weickert
- Los Alamos National Laboratory
Eric D. Bauer
- Los Alamos Natl Lab
- Los Alamos National Laboratory
- Los Alamos National laboratory, Los Alamos, NM, 87544, USA
J. Thompson
- Los Alamos National Laboratory
- Los Alamos Natl Lab
Ni Ni
- UCLA Physics \& Astronomy
- Los Alamos National Laboratory
- University of California, Los Angeles
- Los Alamos National laboratory, Los Alamos, NM, 87544, USA
Filip Ronning
- Los Alamos Natl Lab
- Los Alamos National Laboratory
- Los Alamos National laboratory, Los Alamos, NM, 87544, USA