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Phys. Rev. Lett. 102, 087602 (2009) [4 pages]Polarization and Adiabatic Pumping in Inhomogeneous Crystals
Received 12 November 2007; published 24 February 2009
We develop a general theory of electric polarization in crystals with inhomogeneous order. We show that the inhomogeneity-induced polarization can be classified into two parts: a perturbative contribution stemming from a correction to the basis functions and a topological contribution described in terms of the Chern-Simons form of the Berry gauge fields. The latter is determined up to an uncertainty quantum, which is the second Chern number in appropriate units. Our theory provides an exhaustive link between microscopic models and the macroscopic polarization. ©2009 The American Physical Society REFERENCES (32)
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S. Picozzi et al., ibid. 99, 227201 (2007). CITING ARTICLESFor access to citing articles, you need to log in.
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