Topological Crystalline States with Non-trivial Relative Group Cohomology
ORAL
Abstract
The method of relative homotopy group has been know useful to characterize the surface defects that are not trivial extensions of bulk defects. We develop the method of relative group cohomology to study novel topological crystalline states characterized by non-trivial relative group cohomology and their relation to fragile topological crystalline states.
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Presenters
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Sydney R Timmerman
Johns Hopkins University
Authors
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Sydney R Timmerman
Johns Hopkins University
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Yi Li
Johns Hopkins University, Physics and Astronomy, Johns Hopkins University