85 citations · 176 across the 5 of their papers we have counts for
5 papers
A theory of electromagnetism with uniquely defined potential and covariant conserved spin
A. B. van Oosten
A theory of electromagnetism is proposed that is based on the Fermi Lagrangian, which is symmetric under electromagnetic spin rotation. Its features are: - the four-potential is un…
Biquadratic interactions and spin-Peierls transition in the spin 1 chain LiVGe2O6
P. Millet, F. Mila, F. C. Zhang +5
The magnetic susceptibility of a new one-dimensional, S=1 system, the vanadium oxide LiVGe2O6, has been measured. Contrary to previous S=1 chains, it exhibits an abrupt drop at 22…
Ab initio determination of exchange integrals and Neel temperature in the chain cuprates
A. B. van Oosten, F. Mila
We report ab initio quantum chemical cluster calculations of the chain (J_a) and the largest interchain (J_b) Heisenberg exchange of the chain cuprates Ca_2CuO_3 and Sr_2CuO_3. We…
Heisenberg exchange enhancement by orbital relaxation in cuprate compounds
A. B. Van Oosten, R. Broer, W. C. Nieuwpoort
We calculate the Heisenberg exchange J in the quasi-2D antiferromagnetic cuprates La2CuO4, YBa2Cu3O6, Nd2CuO4 and Sr2CuO2Cl2. We apply all-electron (MC)SCF and non-orthogonal CI ca…
Exchange in the linear cuprate antiferromagnets Sr2CuO3 and Ca2CuO3
A. B. van Oosten
Ab initio quantum chemical calculations of Heisenberg exchange in linear cuprate antiferromagnets are reported. For Sr2CuO3 I obtain Ja=-119 meV for the intrachain coupling and Jb=…