DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2006 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.112: Poster

Wednesday, March 29, 2006, 14:30–18:30, P1

Charge order induced pseudo gap and phonon anomalies in the superconducting cobaltate NaxCoO2 yH2O — •P. Lemmens1,2, K.-Y. Choi3, V. Gnezdilov4, F.C. Chou5, C.T. Lin1, and B. Keimer11MPI-FKF, D-70569 Stuttgart, Germany — 2IPKM, TU Braunschweig, D-38106 Braunschweig — 3IMR, Tohoku Univ., Sendai — 4B.I. Verkin Inst. for Low Temp. Phys., NASU, 61164 Kharkov — 5CMSE, MIT, Cambridge, MA 02139

We report on the observation of an electronic Raman scattering continuum in nonsuperconducting and superconducting cobaltates NaxCoO2 yH2O. Pronounced phonon anomalies are observed in the proximity of the metal-insulator transition and the charge ordering instabilities in Na0.5CoO2. We analyze the scattering rates as function of composition and emphasis an anomalous non-Fermi liquid like regime for x ≥0.5. Work supported by DFG SPP1073, ESF-HFM and MRSEC Program of NSF under award number DMR 02-13282.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2006 > Dresden