221 citations · 574 across the 7 of their papers we have counts for
7 papers
Coherent Order Parameter Oscillations in the Ground State of the Excitonic Insulator Ta2NiSe5
Daniel Werdehausen, Tomohiro Takayama, Marc Höppner +6
The excitonic insulator is an intriguing electronic phase of quasi-condensed excitons. A prominent candidate is the small bandgap semiconductor Ta2NiSe5, in which excitons are beli…
Optical anisotropy of the Jeff = 1/2 Mott insulator Sr2IrO4
D. Pröpper, A. N. Yaresko, M. Höppner +7
We report the complex dielectric function along and perpendicular to the IrO2 planes in the layered perovskite Sr2IrO4 determined by spectroscopic ellipsometry in the spectral rang…
Two-magnon Raman scattering and pseudospin-lattice interactions in Sr2IrO4 and Sr3Ir2O7
H. Gretarsson, N. H. Sung, M. Hoeppner +3
We have used Raman scattering to investigate the magnetic excitations and lattice dynamics in the prototypical spin-orbit Mott insulators Sr2IrO4 and Sr3Ir2O7. Both compounds exhib…
Efficient real frequency solver for dynamical mean field theory
Y. Lu, M. Höppner, O. Gunnarsson +1
We here present how a self-consistent solution of the dynamical mean field theory equations can be obtained using exact diagonalization of an Anderson impurity model with accuracie…
Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments
Alla Chikina, Marc Höppner, Silvia Seiro +13
Carrying a large, pure spin magnetic moment of 7 bohr/atom in the half-filled 4f shell, divalent europium is an outstanding element for assembling novel magnetic devices in whic…
A combined experimental and computational study of the pressure dependence of the vibrational spectrum of solid picene C_22H_14
F. Capitani, M. Hoeppner, B. Joseph +9
We present high-quality optical data and density functional perturbation theory calculations for the vibrational spectrum of solid picene (CH) under pressure up to 8…
Interplay of Dirac fermions and heavy quasiparticles in solids
M. Höppner, S. Seiro, A. Chikina +14
Many-body interactions in crystalline solids can be conveniently described in terms of quasiparticles with strongly renormalized masses as compared to those of non-interacting part…