40 citations · 203 across the 12 of their papers we have counts for
9 papers · 1 filter
Antiferromagnetic phase of the Kondo-insulator
R. Eder, P. Wrobel
We discuss the quasiparticle band structure of the antiferromagnetic phase of the planar Kondo lattice model with a half-filled conduction band, the so-called Kondo insulator. The…
Antiferromagnetic Phases of the Kondo Lattice
R. Eder, K. Grube, P. Wrobel
We discuss the paramagnetic and Neel-ordered phases of the Kondo lattice Hamiltonian on the 2D square lattice by means of bond Fermions. In the doped case we find two antiferromagn…
Doping driven Small-to-Large Fermi surface transition and d-wave superconductivity in a two-dimenional Kondo lattice
R. Eder, P. Wrobel
We study the two-dimensional Kondo lattice model with an additional Heisenberg exchange between localized spins. In a first step we use mean-field theory with two order parameters.…
Theory of the Lightly Doped Mott Insulator
R. Eder, P. Wrobel, Y. Ohta
A theory for the Hubbard model appropriate in the limit of large U/t, small doping away from half-filling and short-ranged antiferromagnetic spin correlations is presented. Despite…
Ferro-Orbitally Ordered Stripes in Systems with Alternating Orbital Order
Piotr Wrobel, Andrzej M. Oles
We establish a novel mechanism of stripe formation in doped systems with alternating orbital order --- the stripe takes the form of a ferro-orbitally ordered domain wall s…
Spin-polaron band structure and hole pockets in underdoped cuprates
P. Wrobel, W. Suleja, R. Eder
We present a variational approach based on the string picture to analyze the internal structure and dispersion of spin polarons with different symmetries in an antiferromagnet. We…