268 citations · 4.1k across the 102 of their papers we have counts for
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Proof of Gauge-Invariance of Magnetic Susceptibility of Topologically Trivial Insulators in the Independent Particle Approximation
Alistair H. Duff, J. E. Sipe
We have derived an expression for the magnetic susceptibility of topologically trivial insulators, however an important consideration for any response tensor is whether it is gauge…
Microscopic Theory of the Magnetic Susceptibility of Insulators
Alistair H. Duff, Aidan Lau, J. E. Sipe
We present a general theory of the magnetic susceptibility of insulators that can be extended to treat spatially varying and finite frequency fields. While there are existing resul…
Theory of Optical Activity in Doped Systems with Application to Twisted Bilayer Graphene
K. Chang, Z. Zheng, J. E. Sipe +1
We theoretically study the optical activity in a doped system and derive the optical activity tensor from a light wavevector-dependent linear optical conductivity. Although the lig…
Polarization and orbital magnetization in Chern insulators: A microscopic perspective
Perry T. Mahon, Jason G. Kattan, J. E. Sipe
We derive macroscopic expressions for the polarization and orbital magnetization of a Chern insulator in its zero-temperature ground state using a previously developed formalism fo…
Electric polarization and magnetization in metals
Perry T. Mahon, J. E. Sipe
A feature of the "modern theory" is that electric polarization is not well-defined in a metallic ground state. A different approach invokes the general existence of a complete set…
Magnetoelectric polarizability and optical activity: spin and frequency dependence
Alistair H. Duff, J. E. Sipe
We extend a microscopic theory of polarization and magnetization to include the spin degree of freedom of the electrons, introducing a general spin orbit coupling and Zeeman intera…