79 citations · 1.4k across the 37 of their papers we have counts for
4 papers · 2 filters
Validity of the local self-energy approximation: Application to coupled quantum impurities
Andrew K. Mitchell, Ralf Bulla
We examine the quality of the local self-energy approximation, applied here to models of multiple quantum impurities coupled to an electronic bath. The local self-energy is obtaine…
Kondo effect in three-dimensional Dirac and Weyl systems
Andrew K. Mitchell, Lars Fritz
Magnetic impurities in three-dimensional Dirac and Weyl systems are shown to exhibit a fascinatingly diverse range of Kondo physics, with distinctive experimental spectroscopic sig…
Multiple magnetic impurities on surfaces: Scattering and quasiparticle interference
Andrew K. Mitchell, Philip G. Derry, David E. Logan
We study systems of multiple interacting quantum impurities deposited on a metallic surface in a 3D host. For the real-space two-impurity problem, using numerical renormalization g…
Quasiparticle interference from magnetic impurities
Philip G. Derry, Andrew K. Mitchell, David E. Logan
Fourier transform scanning tunneling spectroscopy (FT-STS) measures the scattering of conduction electrons from impurities and defects, giving information about the electronic stru…