Disentangling orbital and spin characteristics of surface-derived states in Dirac nodal line semimetals

ORAL

Abstract

In this work, we explore surface states of nonsymmorphic semimetals with lifted band degeneracy at the symmetry points. HfSiS, a typical Dirac nodal-line semimetal with the nonsymmorphic symmetry exhibits a Rashba-type spin-split surface state. In this regard, we explore the Rashaba surface states which draw an analogy to the topological materials, where the spin and orbital entanglement takes place. We have performed spin- and angle-resolved photoemission spectroscopy experiment on HfSiS and ZrSiS single crystals with p-polarized and s-polarized light. The observed variation in the intensity distribution upon changing the light polarization tells us that the surface states along the M-X-M line are mainly composed of dz2 orbitals, and change into dyz along the G-X-G line. Combining the observed spin polarizations with the result of the slab calculation, we have concluded that the surface bands surrounding the X point exhibit a quite anisotropic spin and orbital texture. Our findings provide a new way of light manipulation by controlling the spin structure in materials which is important for future applications.

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Presenters

  • XIAOXIAO WANG

    • Graduate School of Science, Hiroshima University, Japan

Authors

  • XIAOXIAO WANG

    • Graduate School of Science, Hiroshima University, Japan

  • Jiahua Chen

    • Graduate School of Science, Hiroshima University, Japan

  • Mingtian Zheng

    • Graduate School of Science, Hiroshima University, Japan

  • Shilong Wu

    • Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

  • Kazuki Sumida

    • Department of Physics Science, Graduate School of Science, Hiroshima University, Japan
    • Graduate School of Science, Hiroshima University, Japan

  • Tomoki Yoshikawa

    • Graduate School of Science, Hiroshima University, Japan

  • Tatiana Menshchikova

    • Tomsk State University, Russia

  • Igor Rusinovip

    • Tomsk State University, Russia

  • Eike F Schwier

    • Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan
    • Hiroshima Synchrotron Radiation Center, Hiroshima University

  • Koji Miyamoto

    • Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

  • Munisa Nurmamat

    • Department of Physics Science, Graduate School of Science, Hiroshima University, Japan
    • Graduate School of Science, Hiroshima University, Japan

  • Taichi Okuda

    • Hiroshima University
    • Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

  • Kenya Shimada

    • Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan
    • Hiroshima Synchrotron Radiation Center, Hiroshima University

  • Mario Novak

    • Department of Physics, University of Zagreb, Croatia

  • Evgueni Chulkov

    • Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastian, Basque Country, Spain
    • Donostia International Physics Center, Spain

  • Akio Kimura

    • Department of Physics Science, Graduate School of Science, Hiroshima University, Japan
    • Graduate School of Science, Hiroshima University, Japan