Abstract
Abstract
The Dirac semimetal PdTe2 was recently reported to be a type-I superconductor (T
c
= 1.64 K,
mT) with unusual superconductivity of the surface sheath. We here report a high-pressure study,
GPa, of the superconducting phase diagram extracted from ac-susceptibility and transport measurements on single crystalline samples. T
c
(p ) shows a pronounced non-monotonous variation with a maximum T
c
= 1.91 K around 0.91 GPa, followed by a gradual decrease to 1.27 K at 2.5 GPa. Surface superconductivity is robust under pressure as demonstrated by the large superconducting screening signal that persists for applied dc-fields
. Surprisingly, for
GPa the superconducting transition temperature at the surface
is larger than T
c
of the bulk. Therefore surface superconductivity may possibly have a non-trivial topological nature. We compare the measured pressure variation of T
c
with recent results from band structure calculations and discuss the importance of a Van Hove singularity.
Funder
Japan Society for the Promotion of Science
Stichting voor de Technische Wetenschappen
Subject
Condensed Matter Physics,General Materials Science
Cited by
25 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献