Naslov
Charge dynamics in cuprate superconductors

Autori
Tutiš, Eduard ; Nikšić, Hrvoje ; Barišić, Slaven

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
From quantum mechanics to technology : proceedings of the XXXIInd Winter School of Theoretical Physics / Petru, Z. ; Przystawa, J. ; Repcewicz, K. - , 1997

Skup
Winter School of Theoretical Physics (32 ; 1996)

Mjesto i datum
Karpacz, Poljska, 19.02.1996. - 29.02.1996

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
charge dynamics. cuprate superconductors; phase separation

Sažetak
In this lecture we present some interesting issues that arise when the dynamics of the charge carriers in the CuO$_2$ planes of the high temperature superconductors is considered. Based on the qualitative picture of doping, set by experiments and some previous calculations, we consider the strength of various inter and intra-cell charge transfer susceptibilities, the question of Coulomb screening and charge collective modes. The starting point is the usual {; ; ; ; ; it p-d}; ; ; ; ; model extended by the long range Coulomb (LRC) interaction. Within this model it is possible to examine the case in which the LRC forces frustrate the electronic phase separation, the instability which is present in the model without an LRC interaction. While the static dielectric function in such systems is negative down to arbitrarily small wavevectors, the system is not unstable. We consider the dominant electronic charge susceptibilities and possible consequences for the lattice properties.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA