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cond-mat.mtrl-sci2016★ 54 cited
Surface theorem for the Chern-Simons axion coupling
Thomas Olsen, Maryam Taherinejad, David Vanderbilt +1
The Chern-Simons axion coupling of a bulk insulator is only defined modulo a quantum of e^2/h. The quantized part of the coupling is uniquely defined for a bounded insulating sampl…
cond-mat.dis-nn2016★ 7 cited
Metal-insulator transition in disordered systems from the one-body density matrix
Thomas Olsen, Raffaele Resta, Ivo Souza
The insulating state of matter can be probed by means of a ground state geometrical marker, which is closely related to the modern theory of polarization (based on a Berry phase).…