3 papers
physics.optics2022
Type-\textbf{III} corner state in second-order topological insulator by distinctly hybridized photonic Wannier functions
Zhenzhen Liu, Guochao Wei, Jun-Jun Xiao
In the presence of crystalline symmetries, second-order topological insulators can be featured by the polarization which is believed identical to the Wannier center. In this Letter…
physics.optics2022
Geometric-anisotropy induced high-order topological insulators in nonsymmorphic photonic crystals
Zhenzhen Liu Guochao Wei, Jun-Jun Xiao
To a significant extent, the rich physical properties of photonic crystals are determined by the underlying geometry, in which the composed symmetry operators and their combination…
cond-mat.mtrl-sci2020
Strain-Induced Room-Temperature Ferroelectricity in SrTiO Membranes
Ruijuan Xu, Jiawei Huang, Edward S. Barnard +11
Advances in complex oxide heteroepitaxy have highlighted the enormous potential of utilizing strain engineering via lattice mismatch to control ferroelectricity in thin-film hetero…