We investigate Jahn-Teller (JT) polaritons, which emerge from the interaction of two normal-incidence electromagnetic modes with perpendicular polarizations in a Fabry-Perot cavity resonator JT active systems. These polaritons are characterized by mixed $(+/-)$--circular polarization that originates molecular vibronic coupling material subsystem. Consequently, exchange photonic and angular mome...

We argue that the unusual properties of a wide class materials based on Jahn-Teller 3d and 4d ions with different crystal electronic structures, from quasi-two-dimensional unconventional superconductors (cuprates, nickelates, ferropnictides/chalcogenides, ruthenate SrRuO4), manganites local superconductivity to 3D ferrates (CaSr)FeO3, nickelates RNiO3 silver oxide AgO charge magnetic order can ...

In the present paper we report on an analysis of the fine structure of the first excited quartet T2g of Mn4+ ions which occupy the octahedral site in the Cs2GeF6 host crystal. The dynamic T2g⊗ (eg + t2g) Jahn–Teller effect is considered in details, including the Ham effect of the reduction of the spin-orbit splitting and displacements of the ligands due to the combined effect of the a1g and eg ...

Moving electrons accompanied by Jahn-Teller phonon and spin-wave clouds may form composite polarons in ferromagnetic narrow-band manganites. The ground-state and the finite-temperature properties of such composite polarons are studied in the present paper. By using the variational method, it is shown that the energy of the system at zero temperature decreases with the formation of the composite...

Two molecular structures of the copper(II) complex, Cu(H2TETA), have been determined by X-ray crystallography. The Jahn–Teller distortion differs between the two structures; occurring either along the axis of the pendant acetate arms or across the macrocyclic ring. An analysis of deposited data from over one hundred copper(II) cyclam X-ray structures in the Cambridge Structural Database (CSD) r...

The origin of the cooperative Jahn-Teller distortion and orbital order in LaMnO3 is central to the physics of the manganites. The question is complicated by the simultaneous presence of tetragonal and GdFeO3-type distortions and the strong Hund's rule coupling between e{g} and t{2g} electrons. To clarify the situation we calculate the transition temperature for the Kugel-Khomskii superexchange ...

Two molecular structures of the copper(II) complex, Cu(H(2)TETA), have been determined by X-ray crystallography. The Jahn-Teller distortion differs between the two structures; occurring either along the axis of the pendant acetate arms or across the macrocyclic ring. An analysis of deposited data from over one hundred copper(II) cyclam X-ray structures in the Cambridge Structural Database (CSD)...