Anisotropic response of spin susceptibility in the superconducting state of UTe2 probed with 125Te−NMR measurement

@article{G.Nakamine_PRB_2021,

title = {Anisotropic response of spin susceptibility in the superconducting state of  UTe2  probed with  125Te − NMR  measurement},

author = {G Nakamine and K Kinjo and S Kitagawa and K Ishida and Y Tokunaga and H Sakai and S Kambe and A Nakamura and Y Shimizu and Y Homma and D Li and F Honda and D Aoki},

url = {https://arxiv.org/abs/2103.02876},

doi = {10.1103/PhysRevB.103.L100503},

year  = {2021},

date = {2021-03-17},

journal = {Physical Review B},

volume = {103},

number = {10},

pages = {L100503},

abstract = {To investigate spin susceptibility in a superconducting (SC) state, we measured the 125 Te -NMR Knight shifts at magnetic fields ( H ) up to 6.5 T along the b and c axes of single-crystal UTe 2 , a promising candidate for a spin-triplet superconductor. In the SC state, the Knight shifts along the b and c axes ( K b and K c , respectively) decreased slightly, and the decrease in K b was almost constant up to 6.5 T. The reduction in K c decreased with increasing H , and K c was unchanged through the SC transition temperature at 5.5 T, excluding the possibility of spin-singlet pairing. Our results indicate that spin susceptibilities along the b and c axes slightly decrease in the SC state in low H , and the H response of SC spin susceptibility is anisotropic on the b c plane. We discuss the possible d -vector state within the spin-triplet scenario and suggest that the dominant d -vector component for the case of H ∥ b changes above 13 T, where T c increases with increasing H .},

keywords = {},

pubstate = {published},

tppubtype = {article}

}