Pregled bibliografske jedinice broj: 158908
Suppression of the Charge-Density Wave State in Sr14Cu24O41 by Calcium Doping
Suppression of the Charge-Density Wave State in Sr14Cu24O41 by Calcium Doping // Bulletin of the American Physical Society / Baudrau, M.Donna (ur.).
Montréal: APS, 2004. (pozvano predavanje, nije recenziran, sažetak, znanstveni)
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Naslov
Suppression of the Charge-Density Wave State in Sr14Cu24O41 by Calcium Doping
Autori
Tomić, Silvia ; Vuletić, Tomislav ; Korin-Hamzić, Bojana ; Gorshunov, Boris ; Haas, Philip ; Room, Thomas ; Dressel, Martin ; Akimitsu, J. ; Sasaki, T. ; Nagata, T.
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Bulletin of the American Physical Society
/ Baudrau, M.Donna - Montréal : APS, 2004
Skup
March Meeting 2004 of Anerical Physical Society
Mjesto i datum
Montréal, Kanada, 22.03.2004. - 26.03.2004
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
spin ladders; charge-density wave; low-frequency dielectric spectroscopy; optical spectroscopy
Sažetak
The charge response in the spin chain and ladder compound Sr14-xCaxCu24O41 is characterized by dc resistivity, low-frequency dielectric spectroscopy and optical spectroscopy. We identify an insulator-to-insulator phase transition below which a charge-density wave (CDW) develops in the ladder arrays. Calcium doping suppresses this phase with the transition temperature decreasing from 210 K for x=0 down to 7 K for x=9, and the CDW gap from 130 meV down to 3 meV, respectively. Whereas at high doping levels the competing CDW order fully vanishes, external pressure is needed to suppress an insulating high-temperature phase and to establish superconductivity. We propose that this is due to increased disorder and two-dimensionality induced by a subtle interplay of both doping and pressure.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
