Single thermodynamic transition at 2 K in superconducting UTe2 single crystals
Single thermodynamic transition at 2 K in superconducting UTe2 single crystals
复制标题
超导 UTe2 单晶中 2 K 的单次热力学转变
作者：
P. Rosa;Ashley Weiland;S. S. Fender;Brian L. Scott;F. Ronning;J. D. Thompson;E. D. Bauer;S. Thomas
UTe 2是一种新发现的非常规超导体，其超导态存在两个超导跃迁和时间反演对称性破缺，有望实现多组分拓扑超导。然而，对两个超导转变的观测仍然存在争议。在这里，我们表明，UTe2单晶显示在2 K的最佳超导转变温度表现出一个单一的过渡和显着的高品质支持其大的剩余电阻比和小的剩余热容量在超导状态。我们的结果揭示了UTe 2的本征超导性质，并提出了在环境压力下UTe 2是否是多组分超导体的问题。UTe2是一种非传统的超导体，具有多组分三重态序参量，但两个超导跃迁的观测仍然存在争议。在这里，UTe 2单晶表现出减少的无序和单一的过渡在2 K，设置新的约束多组分超导的情况。
UTe2 is a newly-discovered unconventional superconductor wherein multicomponent topological superconductivity is anticipated based on the presence of two superconducting transitions and time-reversal symmetry breaking in the superconducting state. The observation of two superconducting transitions, however, remains controversial. Here we demonstrate that UTe2 single crystals displaying an optimal superconducting transition temperature at 2 K exhibit a single transition and remarkably high quality supported by their large residual resistance ratio and small residual heat capacity in the superconducting state. Our results shed light on the intrinsic superconducting properties of UTe2 and bring into question whether UTe2 is a multicomponent superconductor at ambient pressure. UTe2 is an unconventional superconductor with a putative multicomponent triplet order parameter, but the observation of two superconducting transitions remains controversial. Here, UTe2 single crystals exhibit reduced disorder and a single transition at 2 K, setting new constraints on the multicomponent superconductivity scenario.
影响因子：
64.8
作者：
Duan, Chunruo;Baumbach, R. E.;Dai, Pengcheng
通讯作者：
Dai, Pengcheng