Unusual hole dependence of Tc in HgBa2CuO4+δ

Q. Xiong, Y. Y. Xue, Y. Cao, F. Chen, Y. Y. Sun, J. Gibson, C. W. Chu, L. M. Liu, A. Jacobson

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69 Citations (Scopus)


The anion doping effect on the superconducting transition temperature (Tc) of HgBa2CuO4+δ has been determined with a wide Tc variation. We found a parabolic variation of Tc with δ over the entire range of superconductivity. Remarkably, the dependence of Tc on p (the number of holes per CuO2) has richer features: for δ≤0.28, Tc is parabolic in p, but with an unusual prefactor and p=0.72δ, giving significantly less than two holes per oxygen; and for δ>0.28, a drastic departure from the parabolic Tc(p) occurs. Implications for the occurrence of superconductivity in this material are discussed.

Original languageEnglish
Pages (from-to)10346-10349
Number of pages4
JournalPhysical Review B
Issue number14
Publication statusPublished - 1994

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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