Effects of Disorder on Magnetic Penetration Depth near Quantum Critical Point in Single Crystals of (Ca<sub>x</sub>Sr<sub>1−x</sub>)<sub>3</sub>Rh<sub>4</sub>Sn<sub>13</sub> Superconductor

ORAL

Abstract

In (CaxSr1−x)3Rh4Sn13 superconductivity (SC) coexists with the charge-density-wave (CDW) with the suggested quantum critical point (QCP) at xc = 0.9. In addition to stoichiometry and pressure, the quantum phase transition in this system has also been tuned to by a controlled nonmagnetic point-like disorder induced by 2.5 MeV electron irradiation [1]. To get further insight into the putative QCP, we studied London (λL), and Campbell (λc), magnetic field penetration depths in pristine and electron-irradiated samples. We examine the prediction of a T-linear low-temperature variation of λL(T) near QCP [2], analyze the absolute value, λL(x,0) [3,4], and probe vortex properties via λc(T,H), which gives direct access to the true critical current density and shape of the pinning potential. In conclusion, we compare the predictions and observations near magnetic (in iron pnictides [3,4]) and structural (this work) QCP.

[1] Elizabeth H. Krenkel and Makariy A. Tanatar and Romain Grasset and Marcin Kończykowski and Shuzhang Chen and Cedomir Petrovic and Alex Levchenko and Ruslan Prozorov, arXiv:2406.16157 (2024)

[2] Jaglul Hasan, Maxim Dzero, Maxim Khodas and Alex Levchenko, Phys. Rev. B 105, 054510 (2022)

[3] K. Hashimoto, Kyuil Cho, T. Shibauchi, S. Kasahara, Y. Mizukami, R. Katsumata, Y. Tsuruhara, T. Terashima, H. Ikeda, M. A. Tanatar, H. Kitano, N. Salovich, R.W. Giannetta, P. Walmsley, A. Carrington, R. Prozorov, Y. Matsuda, Science 336, 1554(2012)

[4] Kamal R Joshi, NM Nusran, Makariy A Tanatar, Kyuil Cho, Sergey L Bud’ko, Paul C Canfield, Rafael M Fernandes, Alex Levchenko, Ruslan Prozorov, New J. Phys. 22, 053037 (2020)

*This work was supported by the National Science Foundation under Grant No. DMR-2219901. M.A.T. and K.R.J. were supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. Ames National Laboratory is operated for the U.S. DOE by Iowa State University under Contract No. DE-AC02-07CH11358. Electron irradiation was performed on SIRIUS platform operated by EMIR&A French network (FR CNRS 3618), proposals No. 20-5925 and 23-4663. Research at the University of California, San Diego (UCSD) was supported by the U.S. Department of Energy (DOE) Basic Energy Sciences under Grant DE-FG02-04ER46105.

–

Presenters

  • Kamal R Joshi

    • Iowa State University

Authors

  • Kamal R Joshi

    • Iowa State University

  • Keke Feng

    • Department of Physics, University of California, San Diego
    • University of California, San Diego
    • University of California San Diego

  • Amlan Datta

    • Iowa State University
    • Ames National Laboratory, Iowa State University

  • Bicky Singh S Moirangthem

    • Iowa State University

  • Sunil Ghimire

    • Iowa State University

  • Elizabeth Helen Krenkel

    • Iowa State University

  • Makariy A. Tanatar

    • Ames National Laboratory

  • Romain Grasset

    • Ecole Polytechnique
    • Laboratoire des Solides Irradiés, CEA/DRF/lRAMIS, École Polytechnique, CNRS, Institut Polytechnique de Paris

  • Marcin Konczykowski

    • Ecole Polytechnique

  • Caleb Robinson

    • University of California, San Diego

  • Gabriel Mercado

    • University of California, San Diego
    • University of California San Diego

  • M. Brian Maple

    • University of California, San Diego
    • University of California San Diego
    • Department of Physics, University of California, San Diego, CA 92093, USA

  • Ruslan Prozorov

    • Iowa State University