<i>S</i>-Wave Superconductivity in the Dirac Line-Nodal Material CaSb<sub>2</sub>
نویسندگان
چکیده
We performed 121/123Sb-nuclear quadrupole resonance (NQR) measurements on the superconducting (SC) line-nodal material CaSb2 in order to investigate electronic properties normal and SC states from a microscopic point of view. In state, nuclear spin-lattice relaxation rate 1/T1 for Sb(1) site, which is responsible parts, approximately proportional temperature, indicating conventional Fermi liquid state. From comparison with band structure calculations, it considered that NQR related character are hidden because behavior originating Fermi-surface parts away nodes dominant. clear coherence peak just below transition temperature an exponential decrease at lower temperatures were observed 1/T1. These results strongly suggest s-wave superconductivity full gap realized CaSb2.
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ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 2021
ISSN: ['0031-9015', '1347-4073']
DOI: https://doi.org/10.7566/jpsj.90.073702