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

doi:10.1016/0921-4534(95)00409-2

Dependence of T_c on hole concentration in HgBa₂CuO_4+δ

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

Executive Vice President

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

HgBa₂CuO_4+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 p_s has been estimated based on thermoelectric power and verified by bond-valence summation. While T_c changes with both p_s and δ parabolically over most of the doping range, p_s ≪ 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 n_s/m^* with oxidation, as that reported in overdoped Tl2201 and Tl1201.

Original language	English
Pages (from-to)	216-218
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	251
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(95)00409-2
Publication status	Published - 1995 Sept 15

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/0921-4534(95)00409-2

Cite this

@article{a103d62f476846389f865dc519da510a,

title = "Dependence of Tc on hole concentration in HgBa2CuO4+δ",

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.",

author = "Q. Xiong and Xue, \{Y. Y.\} and Y. Cao and F. Chen and J. Gibson and Liu, \{L. M.\} and A. Jacobson and Chu, \{C. W.\}",

note = "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.",

year = "1995",

month = sep,

day = "15",

doi = "10.1016/0921-4534(95)00409-2",

language = "English",

volume = "251",

pages = "216--218",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier BV",

number = "3-4",

}

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.

UR - https://www.scopus.com/pages/publications/0029373338

UR - https://www.scopus.com/pages/publications/0029373338#tab=citedBy

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 -

Dependence of T_c on hole concentration in HgBa₂CuO_4+δ

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this