Publications (46)
Chemical trend of exchange couplings in diluted magnetic II-VI semiconductors
T. Chanier, F. Virot, R. Hayn
We have calculated the chemical trend of magnetic exchange parameters (, , and ) of Zn-based II-VI semiconductors ZnA (A=O, S, Se, and Te) doped with Co or Mn.…
CeFePO: f-d hybridization and quenching of superconductivity
M. G. Holder, A. Jesche, P. Lombardo +11
Being homologue to the new, Fe-based type of high-temperature superconductors, CeFePO exhibits magnetism, Kondo and heavy-fermion phenomena. We experimentally studied the electroni…
Non-rigid hole band in the extended t-J model
R. Hayn, A. F. Barabanov, J. Schulenburg
The dispersion of one hole in an extended - model with additional hopping terms to second and third nearest neighbours and a frustration term in the exchange part has been in…
Mechanisms of magnetoelectricity in manganese doped incipient ferroelectrics
R. O. Kuzian, V. V. Laguta, A. -M. Dare +8
We report magnetization measurements and magnetic resonance data for SrTiO3 doped by manganese. We show that the recently reported coexistent spin and dipole glass (multiglass) beh…
Orbital polaron in double exchange ferromagnets
T. L. Van den Berg, P. Lombardo, R. O. Kuzian +1
We investigate the spectral properties of the two-orbital Hubbard model, including the double hopping term, by means of the dynamical mean field method. This Hamiltonian describes…
Crystal field theory of Co in doped ZnO
R. O. Kuzian, A. M. Daré, P. Sati +1
We present a crystal field theory of transition metal impurities in semiconductors in a trigonally distorted tetrahedral coordination. We develop a perturbative scheme to treat cov…