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Thermionic Emission and Negative dI/dV in Photoactive Graphene Heterostructures
J. F. Rodriguez-Nieva, M. S. Dresselhaus, L. S. Levitov
Transport in photoactive graphene heterostructures, originating from the dynamics of photogenerated hot carriers, is governed by the processes of thermionic emission, electron-latt…
Surface plasmons on a thin film topological insulator
Zohreh Davoudi, Andreas Karch
Recently it has been shown that surface plasmons supported by an interface between a 3+1 dimensional topological insulator and a metal or between a 3+1 dimensional topological insu…
Finite size effects on the statistical angle of an electron induced dyon in proximity to a topological insulator
Sichun Sun, Andreas Karch
A pointlike electric charge close to the surface of a three dimensional topological insulator induces a magnetic monopole mirror charge. We study the distance dependence of the sta…
Surface Plasmons and Topological Insulators
Andreas Karch
We study surface plasmons localized on interfaces between topologically trivial and topologically non-trivial time reversal invariant materials in three dimensions. For the interfa…
Electric-Magnetic Duality and Topological Insulators
Andreas Karch
We work out the action of the SL(2,Z) electric-magnetic duality group for an insulator with a non-trivial permittivity, permeability and theta-angle. This theory has recently been…