1. Infrared symmetry breaking in YBa2Cu3O7-x as a function of energy, doping, and temperature
- Author
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J. Barber, H. Zhang, T. Gujar, Gideon Koren, John Wei, J. Cerne, Jung-Hun Seo, Chao Zhang, and T. Kirzhner
- Subjects
Materials science ,High-temperature superconductivity ,Condensed matter physics ,Magnetoresistance ,Rotational symmetry ,Linear dichroism ,law.invention ,symbols.namesake ,law ,Condensed Matter::Superconductivity ,Faraday effect ,symbols ,Cuprate ,Symmetry breaking ,Energy (signal processing) - Abstract
We explore the symmetry-breaking in cuprate high temperature superconductors (HTS) as a function of energy (117–2330 meV), doping, and temperature (30–300 K). We measure the Faraday rotation angle $\theta_{\mathrm{F}}$ of transmitted radiation through thin YBa 2 Cu 3 O 7-x (YBCO) films as the sample is rotated. We observe twofold rotational symmetry in $\theta_\mathrm{{F}}$ , which is associated with linear dichroism (LD) that can be generally associated with symmetry breaking. The LD signal shows a peak in the few hundred meV range and is strongest in under-doped films.
- Published
- 2020
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