21 citations · 40 across the 4 of their papers we have counts for
4 papers
Plaquette bond order wave in the quarter-filled extended Hubbard model on the checkerboard lattice
Martin Indergand, Carsten Honerkamp, Andreas Laeuchli +2
An extended Hubbard model (including nearest-neighbor repulsion and antiferromagnetic spin exchange) is investigated on the frustrated checkerboard lattice, a two-dimensional analo…
Bond order wave instabilities in doped frustrated antiferromagnets: "Valence bond solids" at fractional filling
Martin Indergand, Andreas Laeuchli, Sylvain Capponi +1
We explore both analytically and numerically the properties of doped t-J models on a class of highly frustrated lattices, such as the kagome and the pyrochlore lattice. Focussing o…
Effective Interaction between the inter-penetrating Kagome lattices in Na_xCoO_2
Martin Indergand, Yasufumi Yamashita, Hiroaki Kusunose +1
A multi-orbital model for a CoO_2-layer in Na_xCoO_2 is derived. In this model the kinetic energy for the degenerate t_2g-orbitals is given by indirect hopping over oxygen, leading…
Inhomogeneously doped two-leg ladder systems
Stefan Wessel, Martin Indergand, Andreas Laeuchli +2
A chemical potential difference between the legs of a two-leg ladder is found to be harmful for Cooper pairing. The instability of superconductivity in such systems is analyzed by…