4 papers
What is wrong with paramagnons?
Hartmut Monien
Systems with itinerant fermions close to a zero temperature quantum phase transition like the high temperature superconductors exhibit unusual non-Fermi liquid properties. The inte…
Renormalization of the Spin-Peierls Transition due to Phonon Dynamics
S. Trebst, N. Elstner, H. Monien
We report results from a systematic strong-coupling expansion of a spin-1/2 Heisenberg chain coupled to Einstein phonons. In the non-adiabatic regime this model is used to describe…
A numerical exact solution of the Bose-Hubbard model
Norbert Elstner, Hartmut Monien
In this paper we report results from a systematic strong-coupling expansion of the Bose-Hubbard model in one and two spatial dimensions. We obtain numerically exact results for the…
Aspects of Spin Dynamics in the Cuprate Superconductors
H. Monien
One of the interesting aspects of the CuO superconductors is that superconductivity is happening so close to the antiferromagnetic state. The nuclear magnetic resonance and the rec…