The A1g Mode in the Hg-1201 Phonon Spectrum as an Indicator of N→S Transition
DOI:
https://doi.org/10.15407/ujpe56.10.1011Keywords:
-Abstract
By analyzing the structure of and the temperature changes in HgBa2CuO4+y phonon spectra, the electron-phonon coupling constant g has been determined for the first time. It is shown that this compound is a superconductor with strong coupling. A frequency interval around 60.4 meV in the HgBa2CuO4+y phonon spectrum, which may be classed as a "soft mode", is revealed. The dominant partial contribution to the density of phonon states in that spectral range is found to be given by O(2) atomic vibrations.
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