Physics – Condensed Matter – Superconductivity
Scientific paper
2006-06-14
Physics
Condensed Matter
Superconductivity
5 pages, 4 figures
Scientific paper
We present the first angle-resolved photoemission measurement on the single-layer Hg-based cuprate, HgBa$_2$CuO$_{4+\delta}$ (Hg1201). A quasi-particle peak in the spectrum and a kink in the band dispersion around the diagonal of the Brillouin zone are observed, whereas no structure is detected near the Brillouin zone boundary. To search for a material-dependent trend among hole-doped cuprates, including Hg1201, we use a tight-binding model to fit their Fermi surfaces. We find a positive correlation between the $T_{c,\mathrm{max}}$ and $t'/t$, consistent with theoretical predictions.
Cho Yasuo
Greven Martin
Hussain Zahid
Lee Wai Shing
Lu Ding H.
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