{"title":"Fano electron-phonon effects in the far-infrared properties of high-Tc superconductors","authors":"E. Kafadaryan","doi":"10.1117/12.375284","DOIUrl":null,"url":null,"abstract":"We present loss-energy spectra, Im ε -1Ω ), calculated by use Kramers- Kronig transformation to the far-infrared reflectivity spectra of the superconducting YBa2Cu3O7-x, Bi4Sr4CaCu3O14+x, Bi2Sr2CaCu2O8+x a-axis oriented textures in a frequency range 50 - 700 cm-1 at temperatures 20 - 300 K, focusing on the phonon properties in the undoped structures. Fano-like antiresonance minima near 300 cm-1 has been observed in a-axis oriented textures well below Tc and analyzed by Fano configuration interaction theory as result of interference between the B2u (B1g) plane- oxygen mode and low-energy charge continua that arises from electronic excitations on the Fermi surface.","PeriodicalId":427427,"journal":{"name":"Atomic and Molecular Spectroscopy","volume":"150 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atomic and Molecular Spectroscopy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1117/12.375284","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We present loss-energy spectra, Im ε -1Ω ), calculated by use Kramers- Kronig transformation to the far-infrared reflectivity spectra of the superconducting YBa2Cu3O7-x, Bi4Sr4CaCu3O14+x, Bi2Sr2CaCu2O8+x a-axis oriented textures in a frequency range 50 - 700 cm-1 at temperatures 20 - 300 K, focusing on the phonon properties in the undoped structures. Fano-like antiresonance minima near 300 cm-1 has been observed in a-axis oriented textures well below Tc and analyzed by Fano configuration interaction theory as result of interference between the B2u (B1g) plane- oxygen mode and low-energy charge continua that arises from electronic excitations on the Fermi surface.
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