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21 papers · 2 filters
Ferromagnetism and correlation strength in cubic barium ruthenate in comparison to strontium and calcium ruthenate: a dynamical mean field study
Qiang Han, Hung T. Dang, A. J. Millis
We present density functional plus dynamical mean field studies of cubic BaRuO using interaction parameters previously found to be appropriate for the related materials CaRuO$_…
Origin of forbidden reflections in multiferroic BaCoGeO by neutron diffraction: Symmetry lowering or Renninger effect?
Andrew Sazonov, Martin Meven, Georg Roth +4
For a symmetry consistent theoretical description of the multiferroic phase of BaCoGeO a precise knowledge of its crystal structure is a prerequisite. In our previous s…
Entanglement scaling of excited states in large one-dimensional many-body localized systems
D. M. Kennes, C. Karrasch
We study the properties of excited states in one-dimensional many-body localized (MBL) systems using a matrix product state algorithm. First, the method is tested for a large disor…
Thermodynamic properties of highly frustrated quantum spin ladders: influence of many-particle bound states
A. Honecker, S. Wessel, R. Kerkdyk +3
Quantum antiferromagnets have proven to be some of the cleanest realizations available for theoretical, numerical, and experimental studies of quantum fluctuation effects. At finit…
Finite-size effects in Luther-Emery phases of Holstein and Hubbard models
J. Greitemann, S. Hesselmann, S. Wessel +2
The one-dimensional Holstein model and its generalizations have been studied extensively to understand the effects of electron-phonon interaction. The half-filled case is of partic…
Strong correlation effects in theoretical STM studies of magnetic adatoms
Hung T. Dang, Manuel dos Santos Dias, Ansgar Liebsch +1
We present a theoretical study for the scanning tunneling microscopy (STM) spectra of surface-supported magnetic nanostructures, incorporating strong correlation effects. As concre…