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Dispersing bimagnons and doping induced bimagnon-charge modes in superconducting cuprates
L. Braicovich, L. J. P. Ament, V. Bisogni +11
In the early days of high temperature superconductivity it was already recognized that magnetic properties of these materials are intimately related to the superconducting ones . W…
Charge ordering and magnetism in quarter-filled Hubbard-Holstein model
Sanjeev Kumar, Jeroen van den Brink
We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic…
Evidence for the formation of a Mott state in potassium-intercalated pentacene
M. F. Craciun, G. Giovannetti, S. Rogge +3
We investigate electronic transport through pentacene thin-films intercalated with potassium. From temperature-dependent conductivity measurements we find that potassium-intercalat…
KCrF_3: Electronic Structure, Magnetic and Orbital Ordering from First Principles
Gianluca Giovannetti, Serena Margadonna, Jeroen van den Brink
The electronic, magnetic and orbital structures of KCrF_3 are determined in all its recently identified crystallographic phases (cubic, tetragonal, and monoclinic) with a set of {\…
Ultrashort Lifetime Expansion for Indirect Resonant Inelastic X-ray Scattering
Luuk J. P. Ament, Filomena Forte, Jeroen van den Brink
In indirect resonant inelastic X-ray scattering (RIXS) an intermediate state is created with a core-hole that has a ultrashort lifetime. The core-hole potential therefore acts as a…
On the relation between decoherence and spontaneous symmetry breaking
Jasper van Wezel, Jan Zaanen, Jeroen van den Brink
We have recently shown that there is a limit to quantum coherence in many-particle spin qubits due to spontaneous symmetry breaking. These results were derived for the Lieb-Mattis…