论文标题
UTE的晶格不稳定$ _2 $由超声测量研究
Lattice Instability of UTe$_2$ Studied by Ultrasonic Measurements
论文作者
论文摘要
使用超声研究了非常规超导体UTE $ _2 $的弹性常数。在本文中，我们报告了在温度下降到2 k的正常状态的弹性响应，在环境压力下以$ h \ h \平行b $最高为14 t。横向超声模式$ c_ {55} $，对应于$ \ varepsilon_ {zx} $的应变敏感性，显示了随温度降低的软化，而$ c_ {44} $和$ c_ {33} $模式不显示这种软化。这种清晰的模式依赖性强烈表明UTE $ _2 $对于此特定对称性具有晶格不稳定性。
The elastic constants of an unconventional superconductor, UTe$_2$, were investigated using ultrasound. In this paper, we report the elastic response of the normal state at temperatures down to 2 K and up to 14 T for $H \parallel b$ at ambient pressure. The transverse ultrasonic mode $C_{55}$, which corresponds to the strain susceptibility of $\varepsilon_{zx}$, shows softening with decreasing temperature, whereas the $C_{44}$ and $C_{33}$ modes do not show such softening. This clear mode dependence strongly suggests that UTe$_2$ has a lattice instability for this specific symmetry.
