DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2008 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 33: Symposium: High-Temperature Superconductivity

TT 33.9: Talk

Thursday, February 28, 2008, 17:05–17:30, H 0104

Charge ordering phenomena and superconductivity in cuprates — •Leonardo Tassini, Bernhard Muschler, Wolfgang Prestel, Rudi Hackl, Michael Lambacher, and Andreas Erb — Walther-Meissner-Institut, 85748 Garching, Germany

The relationship between charge ordering phenomena and superconductivity was investigated with electronic Raman scattering in La2−xSrxCuO4 (LSCO) and Y1−yCayBa2Cu3O6+x (Y-123) single crystals. New low-energy excitations were found that are interpreted in terms of dynamical stripes. Below the onset point of superconductivity psc1 the stripes are oriented along the diagonal of the CuO2 planes for both LSCO and Y-123. The Raman data indicate that diagonal stripes compete with superconductivity. Apparently, stripes along the CuO direction lead to a relatively low-Tc such as in LSCO, while two-dimensional ordering such as observed by neutron scattering in Y-123 leads to high-Tc of the order of 100 K.

The project has been supported by the DFG under grant number Ha2071/3-1 via the Research Unit FOR 538.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2008 > Berlin