Defect Formation on the Surface of Giant Rashba Systems

ORAL

Abstract

Polar discontinuity at interfaces of different materials may give nontrivial atomic or electronic properties. A well-known case is the interface between insulating LaAlO3 and SrTiO3 perovskites, which possesses electron gas with extremely high carrier mobility. No consensus has been reached regarding the origin of this conductive layer, but many studies indicate polar discontinuity plays a significant role. Recently, the family of BiTeX (X= I, Br, Cl) is reported as polar semiconductors with giant Rashba-type spin splitting effect. They have drawn intensive research interests since then because of the great potentials for practical spintronic functions. The bulk polar atomic corrugations give rise to significant polar discontinuities near the surface. Via scanning tunneling microscopy (STM), we found that the cleaving temperature can dramatically influence the defect formation on the surface of giant Rashba semiconductor BiTeCl. Here, we will present the detailed STM and DFT studies to understand the underlying mechanism.

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Presenters

  • Wenhan Zhang

    Rutgers-Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Rutgers Univ, Physics and Astronomy, Rutgers Univ

Authors

  • Wenhan Zhang

    Rutgers-Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Rutgers Univ, Physics and Astronomy, Rutgers Univ

  • Damien West

    Rensselaer Polytechnic Institute, Physics, Rensselaer Polytechnic Institute, Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute

  • Lunyong Zhang

    Max Planck POSTETH, Pohang University of Science and Technology, Korea Research Initiative, Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology

  • Sang-Wook Cheong

    Rutgers University, Department of Physics and Astronomy, Rutgers University, Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Physics, Rutgers University, Physics and Astronomy, Rutgers University, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Physics and Astronomy, Rutgers Univ., Rutgers Univ, Physics, Rutgers Univesity, Department of Physics, Rutgers University, Physics and Astronomy, Rutgers Center for Emergent Materials, Department of Physics & Astronomy , Rutgers University

  • Shengbai Zhang

    Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Rensselaer Polytechnic Institute, Physics, Rensselaer Polytechnic Institute, Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute

  • Weida Wu

    Department of Physics and Astronomy, Rutgers University, Rutgers-Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Rutgers Univ, Physics and Astronomy, Rutgers Univ, Department of Physics and Astronomy, Rutgers, the State College of New Jersey