TY - JOUR
T1 - Dependence of Tc on hole concentration in HgBa2CuO4+δ
AU - Xiong, Q.
AU - Xue, Y. Y.
AU - Cao, Y.
AU - Chen, F.
AU - Gibson, J.
AU - Liu, L. M.
AU - Jacobson, A.
AU - Chu, C. W.
N1 - Funding Information:
This work is supported by NSF Grant No. DMR 91-22043, NASA Grant No. NAGW-977, Texas Center for Superconductivity at the University of Houston, and the T.L.L. Temple Foundation.
PY - 1995/9/15
Y1 - 1995/9/15
N2 - 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.
AB - 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.
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U2 - 10.1016/0921-4534(95)00409-2
DO - 10.1016/0921-4534(95)00409-2
M3 - Article
AN - SCOPUS:0029373338
SN - 0921-4534
VL - 251
SP - 216
EP - 218
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 3-4
ER -