Type-I superconductivity was recently reported for the Dirac semimetal ${\mathrm{PdTe}}_2$ ($T_c\approx 1.6$ K) with, remarkably, multiple critical fields and a complex phase diagram. Here, measurements of the specific heat utilizing a thermal relaxation technique are presented. Conventional weak-coupling BCS superconductivity is confirmed by examining the temperature dependence of the specific heat in zero field. By probing the latent heat accompanying the superconducting transition, thermodynamic evidence for type-I superconductivity is attained. The presence of the intermediate state is observed as a significant broadening of the superconducting transition onto lower temperatures at high fields as well as irreversibility in the specific heat in zero-field-cooled data at 8.5 mT.

中文翻译：

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Dirac半金属PdTe2中I型超导的热容

最近报道了狄拉克半金属的I型超导性 ${\mathrm{碲化镉}}_{\mathrm{2个}}$ （${Ť}_C\approx 1.6$K）具有多个关键字段和一个复杂的相图。在此，介绍了利用热弛豫技术测量比热的方法。通过检查零场中比热的温度依赖性，可以确认传统的弱耦合BCS超导性。通过探测伴随超导转变的潜热，获得了I型超导的热力学证据。观察到中间状态的存在是在8.5 mT的零场冷却数据中，高磁场下超导转变显着扩展到了较低的温度，以及比热的不可逆性。