Spin fluctuations driving field-reinforced superconductivity in UTe

Tokunaga, Yo

$^{125}$ Te NMR measurements reveal an enhancement of electronic spin fluctuations above 15 T, leading to their divergence in the vicinity of the metamagnetic transition at 35 T, below which field-reinforced superconductivity appears when a magnetic field is applied along the crystallographic 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.

Language	:	English
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Meeting title	:	令和5(2023)年度学術変革領域研究(A)「アシンメトリが彩る量子物質の可視化・設計・創出」トピカルミーティング
Held date	:	2023/08
Location (city)	:	札幌
Location (country)	:	日本
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Keywords	:	スピン三重項超伝導; 核磁気共鳴; ウラン系超伝導
Research Facility	:	第4研究棟
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Registration No. : BB20230698
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