120 citations · 232 across the 5 of their papers we have counts for
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Reduced dimensionality in layered quantum dimer magnets: Frustration vs. inhomogeneous condensates
Oliver Rösch, Matthias Vojta
Motivated by recent experiments on BaCuSi2O6, we investigate magnetic excitations and quantum phase transitions of layered dimer magnets with inter-layer frustration. We consider t…
Quantum phase transitions and dimensional reduction in antiferromagnets with inter-layer frustration
Oliver Rösch, Matthias Vojta
For magnets with a fully frustrated inter-layer interaction, we argue that the quantum phase transitions from a paramagnetic to an antiferromagnetic ground state, driven by pressur…
Sum rules and vertex corrections for electron-phonon interactions
O. Rösch, G. Sangiovanni, O. Gunnarsson
We derive sum rules for the phonon self-energy and the electron-phonon contribution to the electron self-energy of the Holstein-Hubbard model in the limit of large Coulomb interact…
Polaronic behavior of undoped high-Tc cuprates
O. Rösch, O. Gunnarsson, X. J. Zhou +6
We present angle-resolved photoemission spectroscopy (ARPES) data on undoped La2CuO4, indicating polaronic coupling between bosons and charge carriers. Using a shell model, we calc…