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CAMP Seminar: Higher-order topological phases in two dimensions

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Wladimir Benalcazar - The Pennsylvania State University
When
06 November 2018 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
Mikael Rechtsman
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I will describe certain topological crystalline insulators (TCI) in two dimensions that host corner-localized fractional charges quantized in multiples of the electronic charge. Recently, we found that this quantization of corner charge happens when TCIs have higher multipole moments in their bulk. In this presentation, I will show that TCIs with vanishing electric moments can also fractionally quantize their corner charge. I will also describe analogs of these phases in photonic systems and in topological superconductors, where the signatures are the protection of confinement of light propagation and the existence of corner-localized Majorana bound states, respectively.

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