Single crystal growth and - phase diagram of spin-triplet superconducting UTe

スピン三重項超伝導体UTeの単結晶育成と-相図

酒井 宏典   

Sakai, Hironori

スピン三重項超伝導体として注目されているUTeにおける新しい単結晶育成法を考案し、その条件最適化をおこなった結果、超伝導転移温度の向上に加えて、残留抵抗率比の大幅な改善がみられた。こうして得られた純良単結晶を用いて、電気抵抗率と交流帯磁率の同時測定を行なって強磁場25Tまでの磁場()-温度()相図の決定を行った。

We have developed a single crystal growth method for UTe, which is attracting attention as a spin-triplet superconductor. With optimized growth conditions, the residual resistivity ratio has been significantly improved, in addition to an increase in superconducting transition temperature. The phase diagram of magnetic field ()-temperature () up to a high magnetic field of 25 T has been determined by simultaneous measurement of electrical resistivity and AC susceptibility using a high-quality single crystal grown by this method.