TY - JOUR
T1 - Superconducting Properties of Heavy Fermion UTe2 Revealed by 125Te-nuclear Magnetic Resonance
AU - Nakamine, Genki
AU - Kitagawa, Shunsaku
AU - Ishida, Kenji
AU - Tokunaga, Yo
AU - Sakai, Hironori
AU - Kambe, Shinsaku
AU - Nakamura, Ai
AU - Shimizu, Yusei
AU - Homma, Yoshiya
AU - Li, Dexin
AU - Honda, Fuminori
AU - Aoki, Dai
N1 - Funding Information:
Acknowledgments The authors would like to thank M. Manago, T. Taniguchi, J. Ishizuka, Y. Yanase, Y. Maeno, and S. Yonezawa, for valuable discussions. This work was supported by the Kyoto University LTM Center, Grants-in-Aid for Scientific Research (Grants Nos. JP15H05745, JP17K14339, JP19K03726, JP16KK0106, JP19K14657, and JP19H04696), and Grants-in-Aid for Scientific Research on Innovative Areas “J-Physics” (Grants Nos. JP15H05882, JP15H05884, and JP15K21732).
Publisher Copyright:
© 2019 Society The Author(s) of Japan.
PY - 2019
Y1 - 2019
N2 - We have performed the 125Te-nuclear magnetic resonance (NMR) measurement in the field along the b axis on the newly discovered superconductor UTe2, which is a candidate of a spin-triplet superconductor. The nuclear spin–lattice relaxation rate divided by temperature 1=T1T abruptly decreases below a superconducting (SC) transition temperature Tc without showing a coherence peak, indicative of UTe2 being an unconventional superconductor. It was found that the temperature dependence of 1=T1T in the SC state cannot be understood by a single SC gap behavior but can be explained by a two SC gap model. The Knight shift, proportional to the spin susceptibility, decreases below Tc, but the magnitude of the decrease is much smaller than the decrease expected in the spin-singlet pairing. Rather, the small Knight-shift decrease as well as the absence of the Pauli-depairing effect can be interpreted by the spin triplet scenario.
AB - We have performed the 125Te-nuclear magnetic resonance (NMR) measurement in the field along the b axis on the newly discovered superconductor UTe2, which is a candidate of a spin-triplet superconductor. The nuclear spin–lattice relaxation rate divided by temperature 1=T1T abruptly decreases below a superconducting (SC) transition temperature Tc without showing a coherence peak, indicative of UTe2 being an unconventional superconductor. It was found that the temperature dependence of 1=T1T in the SC state cannot be understood by a single SC gap behavior but can be explained by a two SC gap model. The Knight shift, proportional to the spin susceptibility, decreases below Tc, but the magnitude of the decrease is much smaller than the decrease expected in the spin-singlet pairing. Rather, the small Knight-shift decrease as well as the absence of the Pauli-depairing effect can be interpreted by the spin triplet scenario.
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U2 - 10.7566/JPSJ.88.113703
DO - 10.7566/JPSJ.88.113703
M3 - Article
AN - SCOPUS:85074919740
SN - 0031-9015
VL - 88
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 11
M1 - 113703
ER -