Variation of the temperature dependence of the penetration depth in HgBa{sub 2}CuO{sub 4+{delta}} with oxidation
- Department of Physics and the Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-5932 (United States)
The penetration depth {lambda} has been deduced from the reversible magnetization of three HgBa{sub 2}CuO{sub 4+{delta}} samples with doping {delta}{close_quote}s at and near the optimal value of 0.22. The obtained superfluid density {ital n}{sub {ital s}}{proportional_to}1/{lambda}{sup 2} at temperature {ital T} follows a parabolic law [1{minus}({ital T}/{ital T}{sub {ital c}}){sup 2}] for the underdoped sample below {ital T}{sub {ital c}} over the entire temperature region examined, where {ital T}{sub {ital c}} is the superconducting transition temperature. However, {ital n}{sub {ital s}} depends on {ital T} linearly for the optimally doped and slightly overdoped samples below 0.5 {ital T}{sub {ital c}}. The observation suggests that {lambda}({ital T}) of cuprate superconductors depends on oxidation in a rather complicated fashion and the interpretation of {lambda}({ital T}) in terms of the superconducting pairing symmetry should be taken with care. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 278717
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
Similar Records
Overdoped regime of the high-{ital T}{sub {ital c}} superconductor HgBa{sub 2}CuO{sub 4+{delta}} and the relation between normal and superconducting carrier densities
Gas effusion spectra of HgBa{sub 2}CuO{sub 4+{delta}}