Study of HgBa₂CuO₄₊δ by Angle-Resolved Photoemission Spectroscopy

الأصل · EN

We present the first angle-resolved photoemission measurement on the single-layer Hg-based cuprate, HgBa₂CuO₄₊δ (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 Tc,max and t'/t, consistent with theoretical predictions.