Highly Confined Phonon Polaritons in Monolayers of Perovskite Oxides.

  title={Highly Confined Phonon Polaritons in Monolayers of Perovskite Oxides.},
  author={Dominik M. Juraschek and Prineha Narang},
  journal={Nano letters},
Two-dimensional (2D) materials are able to strongly confine light hybridized with collective excitations of atoms, enabling electric-field enhancements and novel spectroscopic applications. Recently, freestanding monolayers of perovskite oxides have been synthesized, which possess highly infrared-active phonon modes and a complex interplay of competing interactions. Here, we show that this new class of 2D materials exhibits highly confined phonon polaritons by evaluating central figures of… 
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