2003/12/19 by S. Lupi, M. Ortolani, Michele Ortolani +1 · 3 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Charge (physics) #Chemistry #Condensed matter physics #Coupling (piping) #Crystallography #Cuprate #Distortion (music) #Doping #Magnetic and transport properties of perovskites and related materials #Materials science #Optical conductivity #Optoelectronics #Phonon #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.69.180506
published as Phys. Rev. B (Rapid Commun.) vol. 69, 180506(R) (2004) · 4 pages including 4 figures
arxiv created 2003/12/19 · openalex publication_date 2004/05/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The optical conductivity of single crystals of NaxCoO2 (for x=0.57) is reported between 295 and 30 K. In the far infrared, an ``anomalous Drude'' analysis leads to a carrier effective mass of 5\ifmmode±\else\textpm\fi1 electron masses. This high value is attributed to strong electron-phonon coupling, as suggested by the Fano distortion of a phonon at 570cm^\ensuremath-1. A peak at 8800cm^\ensuremath-1 scales with the charge transfer band of high-Tc cuprates by simply replacing the in-plane Cu-O bond length with that for Co-O.