Infrared linear dichroism resonance in over-, under-, and optimally-doped cuprate superconductors

ORAL

Abstract

We report systematic measurements on epitaxial thin films of high-temperature cuprate superconductors using polarization sensitive measurements. We measure the complex Faraday angle at zero magnetic field as a function of temperature (10-300K), energy (3 to 2330 meV), and doping. We observe a Faraday rotation signal, which shows sample orientation dependence that can be best associated with linear dichroism (LD) [1]. The LD signal may be due to nematic charge ordering in the cuprates, as has been observed in dc Hall transport measurements [2]. The Faraday rotation signal, as large as 22 mrad near 400 meV, is strongest in under-doped films even at 300K and it shows strong frequency dependence as well as doping dependence, which provides important clues for resolving the microscopic mechanism responsible for the anisotropy.
[1] Lubashevsky, Y., Pan, L. D., Kirzhner, T., Koren, G. & Armitage, N. P., “Optical birefringence and dichroism of cuprate superconductors in the THz regime,” Phys. Rev. Lett. 112,147001 (2014)
[2] J. Wu, A. Bollinger, X. He, and I. Bozović, "Spontaneous breaking of rotational symmetry in copper oxide superconductors," Nature 547, 432 (2017)

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Presenters

  • Jungryeol Seo

    University at Buffalo, The State University of New York

Authors

  • Jungryeol Seo

    University at Buffalo, The State University of New York

  • Alok Mukherjee

    University at Buffalo, The State University of New York

  • Mumtaz Murat Arik

    University at Buffalo, The State University of New York

  • Deepu George

    Physics, University at Buffalo, Department of Physics, University at Buffalo, Buffalo, New York, United States, University at Buffalo, The State University of New York

  • Andrea Markelz

    Physics, University at Buffalo, Physics, University at Buffalo, The State University of New York, Department of Physics, University at Buffalo, Buffalo, New York, United States, University at Buffalo, The State University of New York

  • John Cerne

    University at Buffalo, The State University of New York

  • Chao Zhang

    Department of Physics, University of Toronto, Physics, University of Toronto

  • Hao Zhang

    Department of Physics, University of Toronto

  • John Y.T. Wei

    Department of Physics, University of Toronto, Physics, University of Toronto

  • Peter Armitage

    Johns Hopkins University, Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD, United States, Department of Physics and Astronomy, Johns Hopkins University

  • Gad koren

    Physics department, Technion - Israel Institute of Technology

  • Tal Kirzhner

    Physics department, Technion - Israel Institute of Technology