Universal {ital T}{sub {ital c}} suppression by in-plane defects in high-temperature superconductors: Implications for pairing symmetry

Journal Article · Wed May 01 00:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.12454· OSTI ID:286118

Tolpygo, S K; Lin, J; Gurvitch, M ^[1]; Hou, S Y; Phillips, J M ^[2]

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1. Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3800 (United States)
2. AT&T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)

The influence of in-plane oxygen defects on the critical temperature, resistivity, and Hall coefficient was studied in YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}} (YBCO) films with different oxygen contents ({ital T}{sub {ital c}0} ranging from 30 to 93 K) with emphasis on the underdoped {open_quote}{open_quote}spin-gap phase.{close_quote}{close_quote} A strong {ital T}{sub {ital c}} suppression was observed, but no influence of the defects on {open_quote}{open_quote}spin-gap{close_quote}{close_quote} features in the transport properties was found. A comparison is made with {ital T}{sub {ital c}} suppression by other in-plane defects such as Zn substitutions for Cu, Pr substitutions for Y in YBCO, and radiation defects in Bi-2201 and Bi-2212 high-{ital T}{sub {ital c}} superconductors. {ital T}{sub {ital c}} suppression by defects is shown to occur in a universal way which is independent of the {ital T}{sub {ital c}0}, carrier concentration, and number of CuO{sub 2} planes per unit cell. It is shown that, independent of whether the in-plane defects induce localized magnetic moments or not, {ital T}{sub {ital c}} is a universal function of the impurity scattering rate, which can be described by the pair-breaking theory for potential scatterers in {ital d}-wave superconductors, but requires that the pair-breaking rate be a factor of 3 smaller than that suggested by the transport data. An alternative description of the {ital T}{sub {ital c}} suppression in terms of the phase fluctuation theory proposed recently by Emery and Kivelson is also discussed. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 286118
• Journal Information: Physical Review, B: Condensed Matter, Vol. 53, Issue 18; Other Information: PBD: May 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
ELECTRIC CONDUCTIVITY
HALL EFFECT
SUPERCONDUCTING FILMS
CUPRATES
BARIUM OXIDES
YTTRIUM OXIDES
BISMUTH OXIDES
STRONTIUM OXIDES
CALCIUM OXIDES
OXYGEN
STOICHIOMETRY
CRYSTAL DEFECTS
TRANSITION TEMPERATURE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
ZINC ADDITIONS
PRASEODYMIUM ADDITIONS
SUBSTOICHIOMETRY
ANISOTROPY
ELECTRON PAIRS
D WAVES
ELECTRON CHANNELING
RADIATION CHEMISTRY