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Fermi Surface of Frustrated Kagome Metal CoSn

ORAL

Abstract

Very recently, topological flat bands in frustrated kagome metal CoSn were observed using angle-resolved photoemission spectroscopy and band structure calculations. [1] Using the molten flux method, we have successfully synthesized large single crystals of CoSn. After detailed structural characterizations, we performed magnetoresistance and torque magnetometry measurements in magnetic fields up to 35 T. Clear quantum oscillations were observed and analyzed in order to map the Fermi surface. In this talk we will discuss detailed results of the Fermi surface topology measurements and prospects for tuning the Fermi level.
[1] M. Kang et al, Nature Communications 11, 4004 (2020).

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Presenters

  • Kaya Wei

    National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Florida State University, CMS, National High Magnetic Laboratory, Florida State University

Authors

  • Kaya Wei

    National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Florida State University, CMS, National High Magnetic Laboratory, Florida State University

  • Jorge Galeano Cabral

    National High Magnetic Field Laboratory, Florida State University, Florida State University, FAMU-FSU College of Engineering, Florida State University

  • Oladehin Olatunde

    National High Magnetic Field Laboratory, Florida State University, Florida State University

  • Eliana Karr

    National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Laboratory

  • David E Graf

    National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Lab, Florida State University, National High Magnetic Field Laboratory, Tallahassee and Florida State University, National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Laboratory (FSU), Department of Physics, Florida State University, National High Magnetic Field Laboratory and Department of Physics, Florida State University, National High Magnetic Field Lab, National High Magnetic Field Laboratory, Tallahassee, FL, CMS, National High Magnetic Laboratory

  • Ryan Baumbach

    National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Laboratory, Florida State University, Physics, NHMFL, Florida State University

  • Theo Siegrist

    Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310, USA, National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Florida State University, FAMU-FSU College of Engineering, Florida State University, Florida State University