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Superconducting Raman responses in the A 1g + B 1g geometry of (a) Hg-1201 and (b) Hg-1223 crystals at 0.4 GPa. Zoom on the frequency range of the A 1g + B 1g Raman spectra of (c) Hg-1201 and (d) Hg-1223 compounds under hydrostatic pressures. The framed frequencies mark the pristine oxygen modes (see Table I). The dotted lines are guides for the eyes.
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The superconducting phase of the HgBa 2 CuO 4+δ (Hg-1201) and HgBa 2 Ca 2 Cu 3 O 8+δ (Hg-1223) cuprates has been investigated by Raman spectroscopy under hydrostatic pressure. Our analysis reveals that the increase of T c with pressure is slower in the Hg-1223 cuprate compared to Hg-1201 due to a charge carrier concentration imbalance accentuated b...
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Context 1
... A 1g + B 1g Raman superconducting responses of (UD92K) Hg-1201 and (UD132K) Hg-1223 single crystals measured inside the anvil cell at 0.4 GPa are reported in Fig. 7. We have nearly the same spectra as those of Fig. 5 but with a poorer signal-to-noise ratio and few additional parasitic phonons (at 570 and 620 cm). We see an asymmetric hump with a maximum around 400 cm in Hg-1201 which is made of two components (cf. Fig. 5). The Hg-1223 spectrum exhibits two broad peaks, one centered around 480 cm ...
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