Fermi surface investigation of intermetallic La<sub>2</sub>Pt<sub>3</sub>Ge<sub>5</sub>

ORAL

Abstract

Rare-earth intermetallic compounds, specifically those in the R2T3X5 family (where R is rare-earth, T is transition metal, and X is p-block element), have garnered interest due to their novel electronic and magnetic properties. Though they have been a topic of research for decades, detailed Fermi surface studies have been lacking. To fill this void, we performed de Haas-van Alphen effect measurements on La2Pt3Ge5, which was reported to have the highest critical temperature in the R2T3X5 family, Tc ~ 8.1 K [1], though the presence of superconductivity is a topic of debate [2]. Our results from a high-quality sample evidence several small pockets in the Fermi surface. Electronic band structure calculations and the implications of our results will be discussed.

[1] N. H. Sung et al., Phys. Rev. B 86, 224507 (2012)
[2] Q. Sheng et al., Chin. Phys. B 26, 057401 (2017)

*A portion of this work was performed at the NHMFL, which is supported by NSF Coop. Agreement No. DMR-1644779 and the State of FL. We acknowledge the support of HLD at HZDR and HFML, members of EMFL. Work at BNL is supported by the U.S. DOE under Contract No. DE-SC0012704. JN and TS acknowledge support from the NSF under grant NSF/DMR-1606952.

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Presenters

  • Elizabeth Green

    • Department of Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
    • National High Magnetic Field Laboratory

Authors

  • Elizabeth Green

    • Department of Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
    • National High Magnetic Field Laboratory

  • Johannes Klotz

    • HLD (HZDR) / TU Dresden

  • Kathrin Goetze

    • HLD (HZDR) / TU Dresden
    • Physics, Warwick University
    • Physics, University of Warwick
    • University of Warwick
    • Department of Physics, University of Warwick
    • Physics Department, University of Warwick, Coventry, CV4 7AL, United Kingdom

  • Tobias Foerster

    • HLD (HZDR)

  • Marc Uhlarz

    • HLD (HZDR)

  • Alix McCollam

    • HFML- Nijmegen

  • Jennifer Neu

    • National High Magnetic Field Laboratory
    • Florida State Univ
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Laboratory, Florida State University

  • Theo Siegrist

    • Florida State Univ
    • National High Magnetic Field Laboratory
    • Natl High Magnetic Field Lab
    • Chemical and Biomedical Engineering, FAMU-FSU College of Engineering
    • National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA.; Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering,

  • Tino Gottschall

    • HLD (HZDR)

  • Joachim Wosnitza

    • HLD (HZDR) / TU Dresden
    • Dresden High Magnetic Field Laboratory, Helmholtz Zentrum Dresden Rossendorf
    • Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf
    • Helmholtz-Zentrum Dresden-Rossendorf

  • Kefeng Wang

    • University of Maryland, College Park
    • Brookhaven National Laboratory
    • Department of Physics, University of Maryland, College Park

  • Cedomir Petrovic

    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Laboratory, NY 11973, USA