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, Mercouri G Kanatzidis, H. Q. Yuan

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2 Citations (Scopus)


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 - Condensed Matter and Materials Physics
Issue number18
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Guo, C. Y., Jiang, W. B., Smidman, M., Han, F., Malliakas, C. D., Shen, B., Wang, Y. F., Chen, Y., Lu, X., Kanatzidis, M. G., & Yuan, H. Q. (2016). Superconductivity and multiple pressure-induced phases in BaPt2As2. Physical Review B - Condensed Matter and Materials Physics, 94(18), [184506].