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Infrared spectra of optical phonons in semiconducting La2CuO4+x single crystals

โœ Scribed by A.V. Bazhenov; K.B. Rezchikov; T.N. Fursova; A.A. Zakharov; M.B. Tsetlin

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
779 KB
Volume
214
Category
Article
ISSN
0921-4534

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โœฆ Synopsis

Far-infrared mfl~ivity spectra R(~) in polarization E.I_ C and DC-conductivity ape have been studied in a semieonducting phase of La2CuO4+x single crystals with various oxygen contents. The spectrum of infrared-active optical phonons has been obtained for stoiehiometric La2CuO4. It has been shown that the phonon spectrum should be analyzed in a framework of the orthorhombie crystal structure at T< 300 IC Extra lines have been found in the phonon spectrum upon doping the crystals with oxygen. The results of studying the temperature dependence of R(~) and a~c allow one to interpret these features as vibrational modes, which are active in the l~arnao scattering spectrum and displayed in the IR spectrum due to their interaction with selflocalized holes.

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