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12 papers · 2 filters
Theory of strongly correlated f and d-electron systems. I. Exact Hamiltonian, Hubbard-Anderson models and perturbation theory near atomic limit within non-orthogonal basis set
Igor Sandalov, Borje Johansson, Olle Eriksson
The theory of correlated electron systems is formulated in a form which allows to use as a reference point an ab initio band structure theory (AIBST). The theory is constructed in…
Spin-Glass State in
G. A. Petrakovskii, K. S. Aleksandrov, L. N. Bezmaternikh +7
Magnetic susceptibility, magnetization, specific heat and positive muon spin relaxation (\musr) measurements have been used to characterize the magnetic ground-state of the spinel…
Magnetic Phase Transitions in the double spin-chains compound
B. Roessli, U. Staub, A. Amato +4
We report high-resolution x-ray diffraction, muon-spin-rotation spectroscopic and specific heat measurements in the double spin-chains compound . The x-ray diffracti…
Perturbation expansion for 2-D Hubbard model
V. Zlatic, B. Horvatic, B. Dolicki +3
We develop an efficient method to calculate the third-order corrections to the self-energy of the hole-doped two-dimensional Hubbard model in space-time representation. Using the D…
Formation of a magnetic soliton lattice in copper metaborate
B. Roessli, J. Schefer, G. Petrakovskii +5
The magnetic ground-state of copper metaborate is investigated by means of elastic neutron scattering.The magnetic structure of CuB2O4 is incommensurate with respect to the chemica…
Influence of Quantum Hall Effect on Linear and Nonlinear Conductivity in the FISDW States of the Organic Conductor (TMTSF)_2PF_6
T. Vuletic, C. Pasquier, P. Auban-Senzier +4
We report a detailed characterization of quantum Hall effect (QHE) influence on the linear and non-linear resistivity tensor in FISDW phases of the organic conductor (TMTSF)2PF6. W…