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Study of HgBa$_2$CuO$_{4+\delta}$ by Angle-Resolved Photoemission Spectroscopy

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arxiv cond-mat/0606347 v1 pith:VG3OXZWC submitted 2006-06-14 cond-mat.supr-con

W.S. Lee , T. Yoshida , W. Meevasana , K.M. Shen , D.H. Lu , W.L. Yang , X.J. Zhou , X. Zhao
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G. Yu Y. Cho M. Greven Z. Hussain Z.-X. Shen
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classification cond-mat.supr-con
keywords angle-resolvedbrillouindeltahg1201hgbaphotoemissionzonearound
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abstract

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.

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