Superconductivity and multiple pressure-induced phases in BaPt2As2

C. Y. Guo, W. B. Jiang, M. Smidman, F. Han, C. D. Malliakas, B. Shen, Y. F. Wang, Y. Chen, X. Lu, M. G. Kanatzidis, H. Q. Yuan

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The recently discovered BaPt2As2 shows a structural distortion at around 275 K, followed by the emergence of superconductivity at lower temperatures. Here we identify the presence of charge-density-wave order at room temperature and ambient pressure using single-crystal x-ray diffraction, with both a superlattice and an incommensurate modulation, where there is a change of the superlattice structure below ≃275 K. Upon applying pressure, BaPt2As2 shows a rich temperature-pressure phase diagram with multiple pressure-induced transitions at high temperatures, the emergence or disappearance of which are correlated with sudden changes in the superconducting transition temperature Tc. These findings demonstrate that BaPt2As2 is a promising system for studying competing interactions and the relationship between high-temperature electronic instabilities and superconductivity.

Original languageEnglish
Article number184506
JournalPhysical Review B
Volume94
Issue number18
DOIs
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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