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Article Dans Une Revue Physical Review Letters Année : 2023

Longitudinal spin fluctuations driving field-reinforced superconductivity in UTe$_2$

Résumé

Our measurements of $^{125}$Te NMR relaxations reveal an enhancement of electronic spin fluctuations above $\mu_0H^*\sim15$ T, leading to their divergence in the vicinity of the metamagnetic transition at $\mu_0H_m\approx35$ T, below which field-reinforced superconductivity appears when a magnetic field ($H$) is applied along the crystallographic $b$ axis. The NMR data evidence that these fluctuations are dominantly longitudinal, providing a key to understanding the peculiar superconducting phase diagram in $H\|b$, where such fluctuations enhance the pairing interactions.

Dates et versions

hal-04300294 , version 1 (22-11-2023)

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Citer

Yo Tokunaga, Hironori Sakai, Shinsaku Kambe, Petr Opletal, Yoshifumi Tokiwa, et al.. Longitudinal spin fluctuations driving field-reinforced superconductivity in UTe$_2$. Physical Review Letters, 2023, 131, pp.226503. ⟨10.1103/PhysRevLett.131.226503⟩. ⟨hal-04300294⟩
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