Dimerization-Induced Fermi Surface Reconstruction in IrTe$_{2}$

ORAL

Abstract

We report a de Haas-van Alphen (dHvA) oscillation study on IrTe$_{2}$ single crystals showing complex dimer formations. By comparing the angle dependence of dHvA oscillations with band structure calculations, we show distinct Fermi surface reconstruction induced by a 1/5-type and a 1/8-type dimerizations. This verifies that an intriguing quasi-two-dimensional conducting plane across the layers is induced by dimerization in both cases. A phase transition from the 1/5-type to the 1/8-type dimerizations reveals that local instabilities associated with intra- and inter-dimer couplings are the main driving force for complex dimer formations in IrTe$_{2}$.

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Authors

  • ManJin Eom

    • Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea

  • Kyoo Kim

    • Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
    • Pohang University of Science and Technology
    • POSTECH

  • Youn Jung Jo

    • Department of Physics, Kyungbook National University, Daegu 702-701, Korea

  • Junjie Yang

    • Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology, Pohang 790-784, Korea

  • Eun Sang Choi

    • National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA

  • Byung Il Min

    • Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
    • Pohang University of Science and Technology
    • POSTECH
    • Pohang University of Science and Technology (POSTECH)

  • Jae-Hoon Park

    • Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea

  • S.-W. Cheong

    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Piscataway, New Jersey 08854, USA
    • Rutgers University, Piscataway, USA
    • Department of Physics and Astronomy, Rutgers University
    • Rutgers University

  • Jun Sung Kim

    • Pohang Univ of Sci \& Tech
    • Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
    • Department of Physics, POSTECH
    • Pohang Univ. of Sci \& Tech