Superconducting dome of LaRu<sub>3</sub>Si<sub>2</sub> under pressure

ORAL

Abstract

Materials with Kagome lattice are known for their exotic quantum properties such as charge density wave (CDW), unconventional superconductivity and topological states. LaRu3Si2 was discovered decades ago with the highest critical temperature (Tc ~ 7K) among RT3Si2 or RT3B2 (R = rare earth elements, T = transition metal) family [1]. Recently it attracted more attention due to being identified as a Kagome system with CDW order above room temperature [2], and unconventional superconductivity [3]. Previous work of muon spin relaxation/rotation on LaRu3Si2 under pressure up to 2 GPa [3] showed minimal effects of pressure, motivating us to study the effects of 30 times higher pressures. Here we report high pressure transport measurements on LaRu3Si2 in a diamond anvil cell up to 64.6 GPa. A superconducting dome was observed, with the maximum Tc of 8.75 K occurring at approximately 8.54 GPa. Superconductivity was not completely suppressed even at the highest measured pressure.



[1] H. Barz, Materials Research Bulletin 15, 1489 (1980).

[2] I. Plokhikh, C. Mielke III, et al. Commun Phys 7, 182 (2024).

[3] C. Mielke III, D. Das, et al. Phys. Rev. B 109, 134501 (2024).

*This work was done at the Ames National Laboratory and supported by U.S. DOE, Basic Energy Sciences, Material Science and Engineering Division under contract No. DE-AC02-07CH11358.

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Presenters

  • Zhuoqi Li

    • Ames National Laboratory

Authors

  • Zhuoqi Li

    • Ames National Laboratory

  • Shuyuan huyan

    • Ames National Laboratory

  • Sergey L Bud'ko

    • Iowa State University
    • Ames National Laboratory, and Department of Physics and Astronomy, Iowa State University
    • Ames National Laboratory and Iowa State University

  • Paul C Canfield

    • Iowa State University
    • Ames National Laboratory, and Department of Physics and Astronomy, Iowa State University
    • Ames National Laboratory and Iowa State University