Protonation enhanced superconductivity in PdTe2

Zhen Liu; Tao Han; Mengqin Liu; Shuting Huang; Zongyuan Zhang; Mingsheng Long; Xingyuan Hou; Lei Shan

doi:10.1088/1361-648X/ac7767

Protonation enhanced superconductivity in PdTe₂

J Phys Condens Matter. 2022 Jun 17;34(33). doi: 10.1088/1361-648X/ac7767.

Authors

Zhen Liu¹, Tao Han^{1

2}, Mengqin Liu¹, Shuting Huang¹, Zongyuan Zhang^{1

2}, Mingsheng Long^{1

2}, Xingyuan Hou^{1

2}, Lei Shan^{1

2}

Affiliations

¹ Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China.
² Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, People's Republic of China.

PMID: 35679850
DOI: 10.1088/1361-648X/ac7767

Abstract

Electrochemical ionic liquid gating is an effective way to intercalate ions into layered materials and modulate the properties. Here we report an enhanced superconductivity in a topological superconductor candidate PdTe₂through electrochemical gating procedure. The superconducting transition temperature was increased to approximately 3.2 K by ionic gating induced protonation at room temperature. Moreover, a further enhanced superconductivity of both superconducting transition temperature and superconducting volume fraction was observed after the gated samples were placed in a glove box for 2 months. This may be caused by the diffusion of protons in the gated single crystals, which is rarely reported in electrochemical ionic liquid gating experiments. Our results further the superconducting study of PdTe₂and may reveal a common phenomenon in the electrochemical gating procedure.

Keywords: electrochemical ionic liquid gating; superconductivity; topological superconductor.