arXiv subjects

Yu. D. Panov

Publications and source records attributed to Yu. D. Panov.

39 records · Page 3Linked to original sources

arXiv1998

Vibronic Mechanism of the Isotope and Pressure Effects in Cuprates

The doped cuprates are considered to be a system of local spinless bosons moving in a lattice of the hole pseudo-Jahn-Teller centers CuO_{4}^{5-}. A detailed qualitative and quantitative description of the vibronic mechanism determining both the isotope substitution and the external pressure effect on T_c is given. This mechanism can properly interpret the principal peculiarities of isotopic and baric effects in cuprates except the region of the well developed percolation phenomena

cond-mat.supr-con↗

arXiv1997

Non-rigid Shell Model and Correlational Mechanism of the Local Pairing

The Hartree-Fock states of the many-electron atomic system can be unstable with respect to a static or dynamic shift of the electron shells. An appropriate non-rigid shell model for atomic clusters is developed. It permits to formulate a convenient approach to the semiempirical description of the different correlation effects and to reveal some new effects.

cond-mat.str-el↗

arXiv1997

Polar Jahn-Teller Centers and Isotope Effect in Copper Oxide high-T_c-Superconductors

The $CuO_4$-cluster based copper oxides are considered as generalized quantum lattice bose-gas or a system of the local singlet bosons moving in a lattice of the hole Jahn-Teller centers $[CuO_{4}^{5-}]_{JT}$. The model is illustrated by the qualitative and quantitative description of the various peculiarities of an isotope shift (IS-) effect in a series of 123-like oxides.

cond-mat.supr-con↗