Tuning magnetic confinement of spin-triplet superconductivity
Tuning magnetic confinement of spin-triplet superconductivity
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DOI：
10.1038/s41535-020-00270-w
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发表时间：
2020-09-25
影响因子：
5.7
通讯作者：
Paglione, Johnpierre
中科院分区：
文献类型：
--
作者：
Lin, Wen-Chen;Campbell, Daniel J.;Paglione, Johnpierre
在沿着UTe（2）的难磁化轴方向施加高达41 T的外磁场，测量了UTe（2）的电磁电阻和隧道二极管振荡器随温度和压力的变化。在这项工作中，我们跟踪作为施加的压力的函数的超导和磁场极化相之间的场诱导的一阶转变，显示随着压力的增加，直到16千巴附近的超导性的消亡和压力诱导的铁磁类基态的出现，这是不同的场极化相和稳定在零场的过渡抑制。再加上第二超导相及其上临界场随压力演化的证据，我们研究了两个正交磁相对超导性的限制以及对理解三重态超导性边界的影响。
Electrical magnetoresistance and tunnel diode oscillator measurements were performed under external magnetic fields up to 41 T applied along the crystallographicbaxis (hard axis) of UTe(2)as a function of temperature and applied pressures up to 18.8 kbar. In this work, we track the field-induced first-order transition between superconducting and magnetic field-polarized phases as a function of applied pressure, showing suppression of the transition with increasing pressure until the demise of superconductivity near 16 kbar and the appearance of a pressure-induced ferromagnetic-like ground state that is distinct from the field-polarized phase and stable at zero field. Together with evidence for the evolution of a second superconducting phase and its upper critical field with pressure, we examine the confinement of superconductivity by two orthogonal magnetic phases and the implications for understanding the boundaries of triplet superconductivity.