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)

*This work is supported by NSF-DMR1410599, NSERC, CFI-OIT and The Canadian Institute for Advanced Research.

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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