DOE OSTI · 3363617
Conventional superconductivity in single-crystalline BiPt
Abstract
Binary Bi-Pd/Pt systems have attracted a lot of interest because of their topologically nontrivial nature along with superconductivity. We report the structural and superconducting properties of high-quality single-crystalline BiPt using a comprehensive range of experimental techniques, including X-ray diffraction, electron microscopy, muon spin rotation/relaxation (𝜇SR), magnetization, resistivity, and heat capacity. Our findings establish that BiPt is a weak type-II superconductor with a transition temperature (𝑇 𝑐 ) of 1.2 K which exhibits pronounced anisotropic superconducting characteristics attributed to its hexagonal crystal structure. Magnetization and electronic transport studies reveal that BiPt lies within the dirty limit, while 𝜇SR and heat capacity data indicate conventional 𝑠-wave superconductivity that maintains time-reversal symmetry. Here, this work provides valuable insights into the pairing symmetry and superconducting mechanism of topologically trivial BiPt, a sound comparison system for other Bi-based topologically nontrivial superconductors.
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Sharma, S. [McMaster University, Hamilton, ON (Canada); University of Minnesota, Minneapolis, MN (United States)] (ORCID:0000000247109615), Pula, M. [McMaster University, Hamilton, ON (Canada)], P., Sajilesh K. [Technion-Israel Institute of Technology, Haifa (Israel)] (ORCID:0000000299214062), Gautreau, J. [McMaster University, Hamilton, ON (Canada)] (ORCID:000900046979431X), Agboola, B. S. [McMaster University, Hamilton, ON (Canada)] (ORCID:0009000325051947), Clancy, J. P. [McMaster University, Hamilton, ON (Canada)] (ORCID:0000000265697369), Sonier, J. E. [Simon Fraser University, Burnaby, BC (Canada)] (ORCID:0000000343897981), Ghara, A. [Indian Institute of Science Education and Research Pune (India)], Dunsiger, S. R. [TRIUMF, Vancouver, BC (Canada)], Greven, M. [University of Minnesota, Minneapolis, MN (United States)], Lagos, M. J. [McMaster University, Hamilton, ON (Canada)], Kanigel, A. [Technion-Israel Institute of Technology, Haifa (Israel)] (ORCID:0000000319478621), Luke, G. M. [McMaster University, Hamilton, ON (Canada); TRIUMF, Vancouver, BC (Canada)] (ORCID:0000000347621173). 2026-03-24. Conventional superconductivity in single-crystalline BiPt. https://doi.org/10.1103/552q-j1kq
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