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Superconducting-Spin Reorientation in Spin-Triplet Multiple Superconducting Phases of UTe2 by Kinjo, Katsuki; Fujibayashi, Hiroki; Matsumura, Hiroki; Hori, Fumiya; Kitagawa, Shunsaku; Ishida, Kenji; Tokunaga, Yo; Sakai, Hironori; Kambe, Shinsaku; Nakamura, Ai; Shimizu, Yusei; Homma, Yoshiya; Li, Dexin; Honda, Fuminori; Aoki, Dai is a scholarly article available to read on EtoBox.

What is Superconducting-Spin Reorientation in Spin-Triplet Multiple Superconducting Phases of UTe2 about?

Superconducting (SC) state has spin and orbital degrees of freedom, and spin-triplet superconductivity shows multiple SC phases due to the presence of these degrees of freedom. However, the observation of spin-direction rotation occurring inside the SC state (SC spin rotation) has hardly been reported. UTe2, a recently discovered topological superconductor, exhibits various SC phases under pressure: SC state at ambient pressure (SC1), high-temperature SC state above 0.5 GPa (SC2), and low-temperature SC state above 0.5 GPa (SC3). We performed nuclear magnetic resonance and AC susceptibility measurements on single-crystal UTe2. The b-axis spin susceptibility remains unchanged in SC2, unlike in SC1, and decreases below the SC2-SC3 transition with spin modulation. These unique properties in SC3 arise from the coexistence of two SC order parameters. Our NMR results confirm the spin-triplet superconductivity with SC spin parallel to b in SC2, and unveil the remaining of spin degrees of freedom in superconducting UTe2.

Author

Kinjo, Katsuki; Fujibayashi, Hiroki; Matsumura, Hiroki; Hori, Fumiya; Kitagawa, Shunsaku; Ishida, Kenji; Tokunaga, Yo; Sakai, Hironori; Kambe, Shinsaku; Nakamura, Ai; Shimizu, Yusei; Homma, Yoshiya; Li, Dexin; Honda, Fuminori; Aoki, Dai

Published

2023

Language

EN