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RESEARCH PRODUCT
Phonons in YBa2Cu3O7?x crystals with site-selective oxygen isotope substitution: Frequencies, normal vectors, non-linear properties
E. Ya. Shermansubject
Materials scienceIsotopeBasis (linear algebra)PhononAnharmonicitySubstitution (logic)chemistry.chemical_elementCondensed Matter PhysicsMolecular physicsOxygenIsotopes of oxygenElectronic Optical and Magnetic MaterialsNonlinear systemchemistryCondensed Matter::SuperconductivityGeneral Materials SciencePhysics::Chemical Physicsdescription
Lattice vibrations of YBa2Cu3O7−x crystals with a site-selective isotope substitution18O→16O are investigated theoretically. It is shown that shifts of the frequencies of A1g oxygen vibrations due to this substitution are smaller than under complete one. However, phonon bands and normal vectors are changed much stronger, especially in the case when apical oxygens are substituted. On the basis of the presented analysis anharmonic properties and transition temperatures of the selectively substituted crystals are also briefly discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-12-01 | Zeitschrift f�r Physik B Condensed Matter |