Magnetic penetration depth and condensate density of cuprate high-{ital T}{sub {ital c}} superconductors determined by muon-spin-rotation experiments

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.10488· OSTI ID:239380

Bernhard, C; Niedermayer, C; Binninger, U; Hofer, A; Wenger, C ^[1]; Tallon, J L; Williams, G V.M. ^[2]; Ansaldo, E J ^[3]; Budnick, J I ^[4]; Stronach, C E; Noakes, D R; Blankson-Mills, M A ^[5]

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1. Universitaet Konstanz, Fakultaet fuer Physik, D-78434 Konstanz (Germany)
2. Institute for Industrial Research and Development, Box 31310, Lower Hutt (New Zealand)
3. TRIUMF, University of British Columbia, Vancouver, British Columbia, V6T2A3 (Canada)
4. Department of Physics, University of Connecticut, Storrs, Connecticut 06268 (United States)
5. Department of Physics, Virginia State University, Petersburg, Virginia 23806 (United States)

We summarize our results of transverse-field muon-spin-relaxation (TF-{mu}SR) experiments on a variety of polycrystalline cuprate high-{ital T}{sub {ital c}} superconducting systems. In this paper we present the conditions under which the {mu}SR depolarization rate at low temperatures {sigma}{sub 0}{proportional_to}{lambda}{sub {ital a}{ital b}}{sup {minus}2}(0){proportional_to}{ital n}{sub {ital s}}(0)/{ital m}{sub {ital a}{ital b}}{sup *} is determined in a unique way by the doping state of CuO{sub 2} planes and the consequent critical temperature {ital T}{sub {ital c}}. Disorder and pinning effects due to various sorts and amounts of dopant atoms do not affect {sigma}{sub 0}. From our results on YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, YBa{sub 2}Cu{sub 4}O{sub 8}, and Y{sub 2}Ba{sub 4}Cu{sub 7}O{sub 15{minus}{delta}} (systems having both planes and chains) we conclude that a superconducting condensate is not only formed in the CuO{sub 2} planes but is induced additionally in the CuO chains. This chain condensate is rapidly suppressed by any disorder in the chains and depends strongly on the oxygen ordering.

• OSTI ID: 239380
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MUON SPIN RELAXATION
PENETRATION DEPTH
POLYCRYSTALS
TRANSITION TEMPERATURE
YTTRIUM OXIDES