dc.contributor.author | Cooper, S. L. | en |
dc.contributor.author | Reznik, D. | en |
dc.contributor.author | Kotz, A. | en |
dc.contributor.author | Karlow, M. A. | en |
dc.contributor.author | Liu, R. | en |
dc.contributor.author | Klein, M. V. | en |
dc.contributor.author | Lee, W. C. | en |
dc.contributor.author | Giapintzakis, John | en |
dc.contributor.author | Ginsberg, D. M. | en |
dc.contributor.author | Veal, B. W. | en |
dc.contributor.author | Paulikas, A. P. | en |
dc.creator | Cooper, S. L. | en |
dc.creator | Reznik, D. | en |
dc.creator | Kotz, A. | en |
dc.creator | Karlow, M. A. | en |
dc.creator | Liu, R. | en |
dc.creator | Klein, M. V. | en |
dc.creator | Lee, W. C. | en |
dc.creator | Giapintzakis, John | en |
dc.creator | Ginsberg, D. M. | en |
dc.creator | Veal, B. W. | en |
dc.creator | Paulikas, A. P. | en |
dc.date.accessioned | 2019-05-06T12:23:30Z | |
dc.date.available | 2019-05-06T12:23:30Z | |
dc.date.issued | 1993 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48302 | |
dc.description.abstract | Optical and Raman-scattering studies of a-, b-, and c-axis YBa2Cu3O6+x between 0.025 and 5.5 eV are presented as a function of doping, and compared to the results of Bi2Sr2CaCu2O8 and La2-xSrxCuO4. Our doping-dependence studies show that the redistribution of spectral weight in the CuO2 planes of YBa2Cu3O6+x differs significantly from that seen in La2-xSrxCuO4. We also find that the redistribution of spectral weight in the cuprates is primarily responsible for the loss of two-magnon Raman-scattering intensity with doping. Finally, we show that bound-carrier contributions comprise a significantly larger fraction of the spectral weight below 1 eV in lower-Tc cuprates such as the 2:1:4 compounds than in higher-Tc cuprates such as YBa2Cu3O6+x and Bi2Sr2CaCu2O8. We suggest that the low-frequency conductivity (<1 eV) in the 2:1:4 compounds is most appropriately described by a two-component picture, while that in YBa2Cu3O6+x and Bi2Sr2CaCu2O8 is adequately described as a single component of strongly interacting carriers. In the metallic phase we find several interesting consequences of a single-component interpretation of the optical data in YBa2Cu3O6+x, such as a linear-in-ω frequency-dependent scattering rate and an increase in the interaction strength with decreased carrier density. Finally, we show that the c-axis optical response in YBa2Cu3O7 (Tc∼90 K) is characterized by a c-axis polarized Raman continuum and a Drude conductivity arising from interbilayer charge transport along the c direction. With decreased doping, the c-axis Drude response decreases dramatically, indicating a decoupling of the CuO2 plane bilayers in YBa2Cu3O6+x. By comparison, the ab-plane optical response is not strongly influenced by interbilayer decoupling, suggesting that the unusual ab-plane charge dynamics in YBa2Cu3O6+x persist in nearly isolated CuO2 plane bilayers. © 1993 The American Physical Society. | en |
dc.language.iso | eng | en |
dc.source | Physical Review B | en |
dc.title | Optical studies of the a-, b-, and c-axis charge dynamics in YBa2Cu3O6+x | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1103/PhysRevB.47.8233 | |
dc.description.volume | 47 | |
dc.description.startingpage | 8233 | |
dc.description.endingpage | 8248 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Giapintzakis, John [0000-0002-7277-2662] | |
dc.description.totalnumpages | 8233-8248 | |
dc.gnosis.orcid | 0000-0002-7277-2662 | |