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Using Python to study the Lifshitz transition in the Dirac semimetal PtTe2 triggered by a magnetic element substitution

ORAL

Abstract

PtTe2 belongs to the family of transition metal dichalcogenides (TMDs) and has garnered significant attention as a type-II Dirac semimetal due to its unique electronic properties. Angle-resolved photoemission spectroscopy (ARPES) measurements are able to reveal its detailed electronic structure and Fermi surface topology. Magnetic element substitution through chromium alloying (CrxPt1-xTe2) induces modifications to the electronic band structure, particularly a topological reconstruction of the Fermi surface known as a Lifshitz transition. We utilize custom Python-based analysis software to characterize the electronic structure evolution in CrxPt1-xTe2 through contour mapping and Euler characteristic calculations of the Fermi surface. Our analysis demonstrates systematic changes in Fermi surface topology with increasing chromium concentration, suggesting the emergence of a Lifshitz transition. Initial findings will be presented along with ongoing developments of additional analytical methods to characterize this topological phase transition.

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Publication: Ivan Pelayo, Derek Bergner, Archibald J. Williams, Jiayuwen Qi, Penghao Zhu, Mahfuzun Nabi,<br>Warren L. B. Huey, Luca Moreschini, Ziling Deng, Tyler Hadsell, Jonathan Denlinger, Alessandra<br>Lanzara, Yuan-Ming Lu, Wolfgang Windl, Joshua Goldberger, and Claudia Ojeda-Aristizabal ArXiv 2312.15371

Presenters

  • Tyler Morgan Jacques Hadsell

    Department of Physics and Astronomy, California State University, Long Beach

Authors

  • Tyler Morgan Jacques Hadsell

    Department of Physics and Astronomy, California State University, Long Beach

  • Derek C Bergner

    University of Southern California, Department of Physics and Astronomy, California State University, Long Beach

  • Ivan Pelayo

    Department of Physics and Astronomy, California State University, Long Beach

  • Archibald J Williams

    Department of Chemistry and Biochemistry, The Ohio State University, The Ohio State University

  • Jiayuwen Qi

    Department of Materials Science and Engineering, The Ohio State University

  • Penghao Zhu

    Ohio State University, Department of Physics, The Ohio State University

  • Mahfuzun Nabi

    Department of Physics and Astronomy, California State University, Long Beach

  • Warren L Huey

    Department of Chemistry and Biochemistry, The Ohio State University

  • Luca Moreschini

    University of California, Berkeley, Department of Physics, University of California at Berkeley, Berkeley, CA, USA, Department of Physics, University of California, Berkeley

  • Ziling Deng

    Department of Materials Science and Engineering, The Ohio State University

  • Jonathan D Denlinger

    Lawrence Berkeley National Laboratory, Advanced Light Source, Lawrence Berkeley National Laboratory

  • Alessandra Lanzara

    University of California, Berkeley, Department of Physics, University of California at Berkeley, Berkeley, CA, USA, Department of Physics, University of California, Berkeley

  • Yuan-Ming Lu

    Department of Physics, The Ohio State University

  • Wolfgang E Windl

    Department of Materials Science and Engineering, The Ohio State University

  • Joshua E Goldberger

    Department of Chemistry and Biochemistry, The Ohio State University, The Ohio State University

  • Claudia Ojeda-Aristizabal

    Department of Physics and Astronomy, California State University, Long Beach, Department of Physics and Astronomy, California State University Long Beach, Department of Physics and Astronomy California State University Long Beach, Department of Physics and Astronomy, California State University of Long Beach