Journal
PHYSICAL REVIEW B
Volume 100, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.174512
Keywords
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Funding
- JSPS of Japan [15H05884, 18H04225]
- JSPS KAKENHI [15K05164, 15H05745, 17J10588, 18H01178, 18H05227]
- Grants-in-Aid for Scientific Research [17J10588, 15H05884, 18H04225, 18H01178, 15K05164, 18H05227] Funding Source: KAKEN
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Surface physics dominated by bulk properties has been one of the central interests in modern condensed matter physics, from electric polarization to bulk-boundary correspondence of topological insulators and superconductors. Here we extend theory of electric polarization to chirality polarizations, that is, surface charges corresponding to local antisymmetries characterized as a bulk property. Using the notion of chirality polarizations, we prove the recently proposed spectral bulk-boundary correspondence, a generalization of bulk-boundary correspondence in one-dimensional chiral symmetric systems into complex frequencies. We show a physically transparent proof via Wannier functions and a formal proof by considering the adiabatic change of surface chirality charges, highlighting the similarities and the differences between electric polarization and chirality polarizations.
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