Raman scattering versus infrared conductivity: Evidence for one-dimensional conduction inLa2−xSrxCuO4

2002/08/06 by Francesca Venturini, F. Venturini, Q.-M. Zhang +11 · 43 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Conductivity #Infrared #Magnetic and transport properties of perovskites and related materials #Materials science #Nuclear magnetic resonance #Optics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Raman scattering #Raman spectroscopy #Spectral line #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.66.060502

published in Physical review. B, Condensed matter 66(6) (American Physical Society) · 4 pages, 3 eps figures

openalex publication_date 2002/08/06 · arxiv created 2002/09/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Raman and infrared (IR) spectra of an underdoped La_1.90Sr_0.10CuO₄ single crystal have been measured as a function of temperature. Both techniques provide unconventional low-energy spectra. The IR conductivity exhibits features peaked at finite frequencies which do not have a counterpart in the Raman response. Below approximately 100 K a transfer of both Raman and IR spectral weight towards lower energies is found and a new component in the Raman response builds up being characterized by a very long lifetime of electrons propagating along the Cu-O bonds.

Citations

• Evolution of a Polaron Band through the Phase Diagram ofNd2−xCexCuO4−y
• The pseudogap in high-temperature superconductors: an experimental survey

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