Infrared properties of T-phase R2CuO4 insulating compounds

S. L. Herr, K. Kamars, D. B. Tanner, S. W. Cheong, G. R. Stewart, Z. Fisk

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Reflectance studies on single crystals of a series of rare-earth (R=Pr, Nd, Sm, Gd) copper oxides have been made to determine phonon frequencies as a function of rare-earth mass. The increase in interatomic force constants with increasing rare-earth mass, which leads to a reduction in the lattice parameters, increases the vibrational frequencies. In addition, the change from the T-phase La2CuO4 to the T<-phase R2CuO4 crystal structure causes changes in the phonon frequencies that are due both to the changing lattice parameters and to the relocation of the apical oxygen atoms.

Original languageEnglish
Pages (from-to)7847-7851
Number of pages5
JournalPhysical Review B
Issue number10
Publication statusPublished - Jan 1 1991


ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Herr, S. L., Kamars, K., Tanner, D. B., Cheong, S. W., Stewart, G. R., & Fisk, Z. (1991). Infrared properties of T-phase R2CuO4 insulating compounds. Physical Review B, 43(10), 7847-7851.