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RESEARCH PRODUCT
Raman scattering studies of ultrathin-layer YBa2Cu3O7/PrBa2Cu3O7 superlattices
T. HahnRudolf FeileR. LiGerhard JakobH. Adriansubject
SuperconductivityMaterials sciencePhysics and Astronomy (miscellaneous)Condensed matter physicsPhononSuperlatticeCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsBrillouin zoneCondensed Matter::Materials Sciencesymbols.namesakeCondensed Matter::SuperconductivityLattice (order)symbolsThin filmRaman spectroscopyRaman scatteringdescription
We present Raman scattering studies ofc-oriented ultrathin-layer superconducting (YBa2Cu3O7) m /(PrBa2Cu3O7) n superlattices. For the superlattice with (m=2,n=1) sequence, Raman spectra reveal a new line in the spectral region around 320 cm−1. It is interpreted as a mode representing a combination of IR optical phonons of the Y-sublayers with an admixture of aB1g type Raman active vibration in the Pr sublayers. This new line, which is similar to those from the interior of the Brillouin zone of the original lattice, does not exhibit superconductivity-induced self-energy effects, although its counterpart in the pure substance does. No additional line is found in the (m=1,n=2) superlattice in the same region, supporting our interpretation for the (m=2,n=1) sample.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-02-01 | Journal of Superconductivity |