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Berry Phase Coupling and the Cuprate Neutron Scattering Resonance
Wei-Cheng Lee, A. H. MacDonald
We examine the influence of coupling between particle-hole and particle-particle spin fluctuations on the inelastic neutron scattering resonance (INSR) in cuprate superconductors i…
Drude weight, plasmon dispersion, and pseudospin response in doped graphene sheets
Marco Polini, A. H. MacDonald, G. Vignale
Plasmons in ordinary electron liquids are collective excitations whose long-wavelength limit is rigid center-of-mass motion with a dispersion relation that is, as a consequence of…
Quantum Wells in Polar-Nonpolar Oxide Heterojunction Systems
C. -C Joseph Wang, Bhagawan Sahu, Hongki Min +2
We address the electronic structure of quantum wells in polar-nonpolar oxide heterojunction systems focusing on the case of non-polar BaVO wells surrounded by polar LaTiO b…
ARPES, Neutrons, and the High- Mechanism
Wei-Cheng Lee, A. H. MacDonald
Extensive ARPES and low-energy inelastic neutron scattering studies of cuprate superconductors can be successfully described using a weak-coupling theory in which quasiparticles on…
Density-Functional Theory of Graphene Sheets
Marco Polini, Andrea Tomadin, Reza Asgari +1
We outline a Kohn-Sham-Dirac density-functional-theory (DFT) scheme for graphene sheets that treats slowly-varying inhomogeneous external potentials and electron-electron interacti…
Hubbard-Thomas-Fermi Theory of Transition Metal Oxide Heterostructures
Wei-Cheng Lee, A. H. MacDonald
We demonstrate that the charge distributions in Hubbard-model representations of transition metal oxide heterojucntions can be described by a Thomas-Fermi theory in which the energ…