Study of HgBa₂CuO₄₊δ by Angle-Resolved Photoemission Spectroscopy
Lee, W. S. · Yoshida, T. · Meevasana, W. · Shen, K. M. · Lu, D. H. · Yang, W. L. · Zhou, X. J. · Zhao, X. · Yu, G. · Cho, Y. · Greven, M. · Hussain, Z. · Shen, Z. -X.
Original · 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.
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