Axion crystals

Ozaki, S; Yamamoto, N

Ozaki, S (reprint author), Keio Univ, Dept Phys, Yokohama, Kanagawa 2238522, Japan.

JOURNAL OF HIGH ENERGY PHYSICS, 2017; (8):

Abstract

The low-energy effective theories for gapped insulators are classified by three parameters: permittivity I mu, permeability mu, and theta angle theta.......

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