Superconductivity in Alkaline Earth Metal-Filled Skutterudites BaxIr4X12 (X = As, P)

Yanpeng Qi; Hechang Lei; Jiangang Guo; Wujun Shi; Binghai Yan; Claudia Felser; Hideo Hosono

doi:10.1021/jacs.7b04274

Superconductivity in Alkaline Earth Metal-Filled Skutterudites Ba_xIr₄X₁₂ (X = As, P)

J Am Chem Soc. 2017 Jun 21;139(24):8106-8109. doi: 10.1021/jacs.7b04274. Epub 2017 Jun 9.

Authors

Yanpeng Qi¹, Hechang Lei¹, Jiangang Guo¹, Wujun Shi^{2

3}, Binghai Yan⁴, Claudia Felser², Hideo Hosono^{1

5}

Affiliations

¹ Materials Research Center for Element Strategy, Tokyo Institute of Technology , 4259 Yokohama, Japan.
² Max Planck Institute for Chemical Physics of Solids , 01187 Dresden, Germany.
³ School of Physical Science and Technology, ShanghaiTech University , 200031 Shanghai, China.
⁴ Department of Condensed Matter Physics, Weizmann Institute of Science , 7610001 Rehovot, Israel.
⁵ Laboratory for Materials and Structures, Tokyo Institute of Technology , 4259 Yokohama, Japan.

PMID: 28578570
DOI: 10.1021/jacs.7b04274

Abstract

We report superconductive iridium pnictides Ba_xIr₄X₁₂ (X = As and P) with a filled skutterudite structure, demonstrating that Ba filling dramatically alters their electronic properties and induces a nonmetal-to-metal transition with increasing the Ba content x. The highest superconducting transition temperatures are 4.8 and 5.6 K observed for Ba_xIr₄As₁₂ and Ba_xIr₄P₁₂, respectively. The superconductivity in Ba_xIr₄X₁₂ can be classified into the Bardeen-Cooper-Schrieffer type with intermediate coupling.

Publication types

Research Support, Non-U.S. Gov't