357 citations · 1.8k across the 59 of their papers we have counts for
6 papers · 1 filter
Propagation of an orbiton in the antiferromagnets: theory and experimental verification
Krzysztof Wohlfeld
In this short review, which is based on the works published between 2011 and 2016, we discuss the problem of the propagation of a collective orbital excitation (orbiton) created in…
How spin-orbital entanglement depends on the spin-orbit coupling in a Mott insulator
Dorota Gotfryd, Ekaterina M. Paerschke, Jiri Chaloupka +2
The concept of the entanglement between spin and orbital degrees of freedom plays a crucial role in understanding various phases and exotic ground states in a broad class of materi…
Photoemission Spectrum of Ca2RuO4: Spin Polaron Physics in an S=1 Antiferromagnet with Anisotropies
Adam Kłosiński, Dmitri V. Efremov, Jeroen van den Brink +1
We derive an S=1 spin polaron model which describes the motion of a single hole introduced into the S=1 spin antiferromagnetic ground state of Ca2RuO4. We solve the model using the…
Emergence of Quasiparticles in a Doped Mott Insulator
Yao Wang, Yu He, Krzysztof Wohlfeld +9
How a Mott insulator develops into a weakly coupled metal upon doping is a central question to understanding various emergent correlated phenomena. To analyze this evolution and it…
Orbital Symmetry and Orbital Excitations in High- Superconductors
Andrzej M. Oleś, Krzysztof Wohlfeld, Giniyat Khaliullin
We discuss a few possibilities of high- superconductivity with more than one orbital symmetry contributing to the pairing. First, we show that the high energies of orbital exc…
Numerical Investigation of Spin Excitations in a Doped Spin Chain
Ekaterina M. Pärschke, Yao Wang, Brian Moritz +3
We study the doping evolution of spin excitations in a 1D Hubbard model and its downfolded spin Hamiltonians, by using exact diagonalization combined with cluster perturbation theo…