High magnetic field measurements of uranium ditelluride

ORAL

Abstract

Few known materials exhibit unconventional superconductivity - far fewer possess phase diagrams containing multiple separate phases of unconventional superconductivity. This talk will review our recent high magnetic field measurements of the actinoid dichalcogenide UTe2, which exhibits numerous distinct superconductive states that persist to remarkably high field strengths. Recent optimization of the growth procedure of UTe2 single crystals has enabled us to map out the exotic phase landscape of this material in the clean limit, with notable similarities and differences between experiments conducted on samples of highly varying levels of crystalline disorder. Notably, in our pulsed field measurements to 80 T we have uncovered signatures of a quantum phase transition anchoring the high field phase landscape, which may shed light on the manifestation of extremely field-resilient superconductivity in this material.

*A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1644779 & DMR-2128556 and the State of Florida. We acknowledge support of the HLD at HZDR, a member of the European Magnetic Field Laboratory (EMFL). Crystal growth and characterization were performed in MGML (mgml.eu), which is supported within the program of Czech Research Infrastructures (project no. LM2023065).

–

Publication: 1. Z. Wu et. al., Enhanced triplet superconductivity in next-generation ultraclean UTe2, PNAS, 121, 37 (2024).
2. Z. Wu et. al., Magnetic signatures of multicomponent superconductivity in pressurized UTe2, arXiv:2403.06650, submitted to Phys. Rev. Lett. (2024).
3. Z. Wu et. al., Three-dimensional quantum criticality, submitted to Phys. Rev. X (2024)
4. Z. Wu et. al., Superconducting critical temperature elevated by intense magnetic fields, submitted to PNAS (2024).

Presenters

  • Zheyu Wu

    • Univ of Cambridge

Authors

  • Zheyu Wu

    • Univ of Cambridge

  • Theodore I Weinberger

    • Univ of Cambridge

  • Alexander J Hickey

    • Univ of Cambridge

  • Dmitry V Chichinadze

    • National High Magnetic Field Laboratory

  • Daniel Shaffer

    • University of Wisconsin - Madison
    • University of Wisconsin, Madison

  • Andrej Cabala

    • Charles University

  • Hanyi Chen

    • Univ of Cambridge

  • Mengmeng Long

    • Univ of Cambridge

  • Troy Brumm

    • National High Magnetic Field Laboratory

  • Zengwei Zhu

    • Huazhong University of Science & Technology

  • Yurii Skourski

    • HLD-EMFL HZDR

  • David E Graf

    • Florida State University
    • National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL
    • NHMFL

  • Vladimír Sechovsky

    • Charles University

  • Michal Vališka

    • Charles University

  • Gilbert G Lonzarich

    • Univ of Cambridge

  • Friedrich M Grosche

    • Univ of Cambridge

  • Alexander Geoffrey Eaton

    • Univ of Cambridge
    • University of Cambridge