@article{H.Takahashi_JPSJ_2021,
title = {S-Wave Superconductivity in the Dirac Line-Nodal Material CaSb2},
author = {H Takahashi and S Kitagawa and K Ishida and M Kawaguchi and A Ikeda and S Yonezawa and Y Maeno},
url = {https://arxiv.org/abs/2105.13614},
doi = {10.7566/JPSJ.90.073702},
year = {2021},
date = {2021-06-11},
urldate = {2021-06-11},
journal = {Journal of the Physical Society of Japan},
volume = {90},
pages = {073702},
abstract = {We performed 121/123Sb-nuclear quadrupole resonance (NQR) measurements on the superconducting (SC) line-nodal material CaSb2 in order to investigate electronic properties in the normal and SC states from a microscopic point of view. In the normal state, the nuclear spin–lattice relaxation rate 1/T1 for the Sb(1) site, which is responsible for the line-nodal parts, is approximately proportional to temperature, indicating the conventional Fermi liquid state. From comparison with band structure calculations, it is considered that the NQR properties related to the line-nodal character are hidden because the conventional behavior originating from Fermi-surface parts away from the nodes is dominant. In the SC state, a clear coherence peak just below the transition temperature and an exponential decrease at lower temperatures were observed in 1/T1. These results strongly suggest that conventional s-wave superconductivity with a full gap is realized in CaSb2.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
