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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…
Role of Inelastic Tunneling through the Barrier in Scanning Tunneling Microscope Experiments on Cuprates
S. Pilgram, T. M. Rice, M. Sigrist
The tunneling path between the CuO2-layers in cuprate superconductors and a scanning tunneling microscope tip passes through a barrier made from other oxide layers. This opens up t…
Checkerboard order in the t--J model on the square lattice
D. Poilblanc, C. Weber, F. Mila +1
We propose that the inhomogeneous patterns seen by STM in some underdoped superconducting cuprates could be related to a bond-order-wave instability of the staggered flux state, on…
The semiconductor-to-ferromagnetic-metal transition in FeSb2
A. V. Lukoyanov, V. V. Mazurenko, V. I. Anisimov +2
We propose FeSb2 to be a nearly ferromagnetic small gap semiconductor, hence a direct analog of FeSi. We find that despite different compositions and crystal structures, in the loc…
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…
Uncommonly High Upper Critical Field in the Superconducting KOsO Pyrochlore
T. Shibauchi, L. Krusin-Elbaum, Y. Kasahara +10
The entire temperature dependence of the upper critical field in the -pyrochlore KOsO is obtained from high-field resistivity and magnetic measurements. Bot…