Optical second harmonic generation study of an insulating parent cuprate

ORAL

Abstract

Signatures of bulk inversion symmetry breaking have recently been reported across the pseudogap transition temperature in under-, optimal- and over-doped YBa2Cu3Oy single crystals using optical second harmonic generation rotational anisotropy (SHG-RA) measurements [1]. However it is presently unknown how this signal evolves upon approaching the un-doped insulating parent compound. Here we report a temperature dependent SHG-RA study of the parent cuprate Sr2CuO2Cl2 and discuss its relationship to recent reports of inversion symmetry breaking in the Mott insulator Sr2IrO4 [2], a strongly spin-orbit coupled analogue of La2CuO4.

[1] Zhao, L. et al., Nature Phys. 13, 250 (2017)
[2] Zhao, L. et al., Nature Phys. 12, 32 (2016)

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Presenters

  • Alberto De la Torre

    • University of Geneva
    • California Institute of Technology
    • Department of Physics, California Institute of Technology

Authors

  • Alberto De la Torre

    • University of Geneva
    • California Institute of Technology
    • Department of Physics, California Institute of Technology

  • Liuyan Zhao

    • University of Michigan
    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan

  • Biqiong Yu

    • University of Minnesota

  • Martin Greven

    • School of Physics and Astronomy, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota Twin Cities
    • University of Minnesota

  • David Hsieh

    • Institute for Quantum Information and Matter, Caltech
    • Department of Physics, California Institute of Technology
    • California Institute of Technology
    • Institute For Quantum Information and Matter, California Institute of Technology