Observation of a Dirac state in a half-Heusler material YPtBi

POSTER

Abstract

The prediction of non-trivial topological electronic states hosted by half-Heusler compounds makes them prime candidates for discovering new physics and devices as they harbor a variety of electronic ground states including superconductivity, magnetism, and heavy fermion behavior. Here we report a systematic study of normal state electronic properties of the superconducting half-Heusler compound YPtBi using angle-resolved photoemission spectroscopy (ARPES). Our data reveal the presence of a Dirac state at the \(\Gamma\) point of the Brillouin zone at 500 meV below the chemical potential. We observe the presence of multiple Fermi surface pockets including two concentric hexagonal and six half oval shaped pockets at the $\Gamma$ and $\kappa$ points of the Brillouin zone, respectively. Furthermore, our measurements show Rashba-split bands and multiple surface states crossing the chemical potential which are supported by the first-principles calculations. Our findings of a Dirac state in YPtBi play a significant role in establishing half-Heusler compounds as a new potential platform for novel topological phases and explore their connection with superconductivity.

Authors

  • Christopher Sims

    University of Central Florida

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories

  • Yoshiharu Krockenberger

    University of California, Santa Cruz, Sandia National Lab, Florida Polytechnic University, Colorado School of Mines, Florida Industrial and Phosphate Research Institute, FL Polytech University, Kenyon College, Institute for Gravitation and the Cosmos, The Pennsylvania State University, University of Wisconsin-Milwaukee, Vanderbilt University, NanoScience Technology Center, University of Central Florida, Orlando, FL, 32826, Florida Space Institute, University of Central Florida, Orlando, FL, 32816, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, 32816, Department of Materials Science and Engineering, University of Cent, UC Davis, University of Central Florida, Polish Academy of Sciences, Los Alamos National Laboratory, Nippon Telegraph and Telephone (NTT) Basic Research Laboratories