286 citations · 1.2k across the 46 of their papers we have counts for
6 papers · 1 filter
Giant exchange interaction in mixed lanthanides
Veacheslav Vieru, Naoya Iwahara, Liviu Ungur +1
Combining strong magnetic anisotropy with strong exchange interaction is a long standing goal in the design of quantum magnets. The lanthanide complexes, while exhibiting a very st…
Dynamical Jahn--Teller instability in metallic fullerides
Naoya Iwahara, Liviu F. Chibotaru
Dynamical Jahn-Teller effect has escaped so far direct observation in metallic systems. It is particularly believed to be quenched also in correlated conductors with orbitally dege…
Dynamical Jahn--Teller effect and antiferromagnetism in CsC
Naoya Iwahara, Liviu F. Chibotaru
The dynamical Jahn--Teller effect on fullerene sites in insulating CsC is investigated fully ab initio. The vibronic excitations of rotational type are at 65 cm$^{-…
Ising exchange interaction in lanthanides and actinides
Liviu F. Chibotaru, Naoya Iwahara
The Ising exchange interaction is a limiting case of strong exchange anisotropy and represents a key property of many magnetic materials. Here we find necessary and sufficient cond…
Exchange interaction between -multiplets
Naoya Iwahara, Liviu F. Chibotaru
Analytical expressions for the exchange interaction between -multiplets of interacting metallic centers are derived on the basis of a complete electronic model. A common belief…
New mechanism of kinetic exchange interaction induced by strong magnetic anisotropy
Naoya Iwahara, Liviu F. Chibotaru
It is well known that the kinetic exchange interaction between single-occupied magnetic orbitals (s-s) is always antiferromagnetic, while between single- and double-occupied orbita…