Raman and infrared (IR) spectra of an underdoped La1.90Sr0.10CuO4 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.
Raman Scattering versus infrared conductivity: Evidence for one-dimensional conduction in LSCO / Venturini, F; ZHANG Q., M; Hackl, R; Lupi, Stefano; Ortolani, Michele; Calvani, Paolo. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 66:(2002), pp. 060502-1-060502-4. [10.1103/PhysRevB.66.060502]
Raman Scattering versus infrared conductivity: Evidence for one-dimensional conduction in LSCO
LUPI, Stefano;ORTOLANI, MICHELE;CALVANI, Paolo
2002
Abstract
Raman and infrared (IR) spectra of an underdoped La1.90Sr0.10CuO4 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.File | Dimensione | Formato | |
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