Low Temperature Specific Heat and Thermal Conductivity in Superconducting UTe_{2}
Abstract
The measurements (Phys.Rev.B {\bf 100}, 220504(R) (2019)) do not detect noticeable thermal conductivity in superconducting UTe$_2$ in the T=0 limit. At the same time the same crystals exhibit a large residual density of states comparable with its normal state value. The improvement of samples quality leads to the augmentation of critical temperature of transition to the superconducting state accompanied by the decreasing of residual specific heat ratio $C(T)/T$ at $T\to 0$. There is presented an analytic derivation of this inverse correlation property in concrete cases of triplet superconducting states with nodeless and pointnodes order parameters allowed by symmetry in UTe$_2$. The obtained explicit formulas for the residual thermal conductivity are in reasonable correspondence with observations.
 Publication:

Journal of the Physical Society of Japan
 Pub Date:
 July 2022
 DOI:
 10.7566/JPSJ.91.074601
 arXiv:
 arXiv:2201.09800
 Bibcode:
 2022JPSJ...91g4601M
 Keywords:

 Condensed Matter  Superconductivity
 EPrint:
 4 pages