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40 papers · 2 filters
Role of multiple subband renormalization in the electronic transport of correlated oxide superlattices
Andreas Ruegg, Manfred Sigrist
Metallic behavior of band-insulator/ Mott-insulator interfaces was observed in artificial perovskite superlattices such as in nanoscale SrTiO3/LaTiO3 multilayers. Applying a semicl…
Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
B. Thielemann, Ch. Rüegg, H. M. Rønnow +12
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon m…
Metal-Insulator phase diagram and orbital selectivity in 3-orbital models with rotationally invariant Hund coupling
Philipp Werner, Emanuel Gull, Andrew J. Millis
A three band model containing the essential physics of transition metal oxides with partially filled t_2g shells is solved in the single-site dynamical mean field approximation, us…
Coherent pumping of a Mott insulator: Fermi golden rule versus Rabi oscillations
Fabian Hassler, Sebastian D. Huber
Cold atoms provide a unique arena to study many-body systems far from equilibrium. Furthermore, novel phases in cold atom systems are conveniently investigated by dynamical probes…
LaBaNiO4: A Fermi glass
A. Schilling, R. DellAmore, J. Karpinski +4
Polycrystalline samples of LaSr1-xBaxNiO4 show a crossover from a state with metallic transport properties for x = 0 to an insulating state as x -> 1. The end member LaBaNiO4 with…
Flatband localization in the Anderson-Falicov-Kimball model
A. M. C. Souza, H. J. Herrmann
The insulator-metal-insulator transition caused by a flatband is analyzed within dynamical mean-field theory using the Anderson-Falicov-Kimball model. We observe quantitative disag…