Exotic Charge-Density Wave in Ladder Planes of Sr14Cu24O41 (CROSBI ID 518237)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Ivek, Tomislav ; Vuletić, Tomislav ; Tomić, Silvia ; Korin-Hamzić, Bojana ; Dresse, Martin ; Gorshunov, Boris ; Akimitsu, J.
engleski
Exotic Charge-Density Wave in Ladder Planes of Sr14Cu24O41
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].
spin ladders; charge density wave; anisotropic phason response
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Podaci o prilogu
2006.
objavljeno
Podaci o matičnoj publikaciji
Recent Developments in Low Dimensional Charge Density Wave Conductors
Dumas, Jean ; Biljaković, Katica
Zagreb: Institut za fiziku
Podaci o skupu
Workshop on Recent Developments in Low Dimensional Charge Density Wave Conductors
predavanje
29.06.2006-03.07.2006
Skradin, Hrvatska