2 citations · 3 across the 10 of their papers we have counts for
13 papers · 1 filter
Comment on ''Implementation of the LDA+U method using the full-potential linearized augmented plane-wave basis''
R. J. Radwanski, Z. Ropka
By this Comment we would like to point out that the authors of Ref. 1 have ignored the orbital magnetism that makes the theory irrelevant to the real systems like NiO.It causes tha…
Comment on "Orbitally degenerate spin-1 model for insulating V2O3"
R. J. Radwanski, Z. Ropka
We criticize the model proposed by Mila et al. (Phys.Rev.Lett. 85 (2000) 1714) for the description of the V3+ ion in V2O3 by pointing out that it is completely artificial because t…
The 3d-electron states in LaCoO3
Z. Ropka, R. J. Radwanski
Three fundamentally different electronic structures for 3d electron states in LaCoO3, discussed in the current literature, have been presented. We are in favour of the localized el…
Comment on ''Low to High Spin-state Transition Induced by charge ordering in Antiferromagnetic YBaCo2O5"
Z. Ropka, R. J. Radwanski
In the commented Letter Vogt et al. (Phys.Rev.Lett. 84 (2000) 2969) claim the existence of a spin-state transition in YBaCo2O5. We think that this claim about the change from the l…
Loss of the magnetism in FeS
Z. Ropka, R. J. Radwanski
It is argued that the formation of the non-magnetic state of FeS in external pressures above 6.5 GPa is in agreement with the prediction of the quantum atomistic solid-state theory…
Comment on ''Alternating spin and orbital dimerization and spin-gap formation in coupled spin-orbital systems''
R. J. Radwanski, Z. Ropka
By this Comment we would like to point out [2] that, though such consideration can be quite sophisticated, the consideration of a spin-pseudo-spin Hamiltonian has nothing in common…