Naslov
Exotic Charge-Density Wave in Ladder Planes of Sr14Cu24O41

Autori
Ivek, Tomislav ; Vuletić, Tomislav ; Tomić, Silvia ; Korin-Hamzić, Bojana ; Dresse, Martin ; Gorshunov, Boris ; Akimitsu, J.

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

Izvornik
Recent Developments in Low Dimensional Charge Density Wave Conductors / Dumas, Jean ; Biljaković, Katica - Zagreb : Institut za fiziku, 2006

Skup
Workshop on Recent Developments in Low Dimensional Charge Density Wave Conductors

Mjesto i datum
Skradin, Hrvatska, 29.06.2006. - 03.07.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
spin ladders; charge density wave; anisotropic phason response

Sažetak
The quantum spin-chain and ladder material Sr14Cu24O41 presents an interesting opportunity to study collective charge dynamics in the charge ordered state inside a spin-gapped en¬ vi¬ ron¬ ment (for a most recent review see [1]). We have characterized the charge response of sin¬ gle crystals along the crystallographic directions parallel to ladder legs and rungs by means of dc resistivity and low frequency dielectric spectroscopy. The ground state in the ladder planes can be identified as a charge density wave insulator, but of a non-standard nature. Resonant X ray scattering [2] shows that the charge order develops in the ladder planes with a 2D long-range order. Our results demonstrate that the CDW sets in below an insulator-to-in¬ su¬ la¬ tor phase transition and possesses an anisotropic phason-like dispersion [1, 3]. In varying dc fields only negligible nonlinear effects emerging from the background noise were observed, at va¬ ri¬ an¬ ce with strong nonlinearities [4] above a finite threshold field reported by other authors [4, 5].

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA