Fano electron-phonon effects in the far-infrared properties of high-Tc superconductors

E. A. Kafadaryan

doi:10.1117/12.375284

28 December 1999 Fano electron-phonon effects in the far-infrared properties of high-T_c superconductors

E. A. Kafadaryan

Proceedings Volume 4060, New Trends in Atomic and Molecular Spectroscopy; (1999) https://doi.org/10.1117/12.375284
Event: New Trends in Atomic and Molecular Spectroscopy, 1999, none, Russian Federation

Abstract

We present loss-energy spectra, Im ε ^-1Ω ), calculated by use Kramers- Kronig transformation to the far-infrared reflectivity spectra of the superconducting YBa₂Cu₃O_7-x, Bi₄Sr₄CaCu₃O_14+x, Bi₂Sr₂CaCu₂O_8+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 T_c and analyzed by Fano configuration interaction theory as result of interference between the B_2u (B_1g) plane- oxygen mode and low-energy charge continua that arises from electronic excitations on the Fermi surface.

Citation Download Citation

E. A. Kafadaryan "Fano electron-phonon effects in the far-infrared properties of high-T_c superconductors", Proc. SPIE 4060, New Trends in Atomic and Molecular Spectroscopy, (28 December 1999); https://doi.org/10.1117/12.375284

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