Dependence of Tc on hole concentration in HgBa2CuO4+δ

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

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

HgBa2CuO4+δ (Hg1201) samples with 0.03 ≤ δ ≤ 0.4 have been obtained. The oxygen surplus δ was calculated from thermogravimetric analysis and compared with neutron powder diffraction data. The hole concentration ps has been estimated based on thermoelectric power and verified by bond-valence summation. While Tc changes with both ps and δ parabolically over most of the doping range, ps ≪ 2 δ, suggesting a complicated electric band structure of Hg1201. It was also observed that the magnetization χ of powdered samples decreases with δ in the overdoped region, suggesting a decrease of ns/m* with oxidation, as that reported in overdoped Tl2201 and Tl1201.

Original languageEnglish
Pages (from-to)216-218
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume251
Issue number3-4
DOIs
Publication statusPublished - 1995 Sep 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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