Temperature and doping dependence of the penetration depth in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}
- Walther-Mei Sner-Institut, Walther-Mei Sner-Strasse 8, D-85748 Garching (Germany)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- France Telecom, Centre National d`Etudes des Telecommunications de Bagneux, F-92220 Bagneux (France)
Using torque magnetometry in the Shubnikov state, we have studied the London penetration depth {lambda}{sub {ital ab}}({ital T}) of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} and (Pb{sub {ital x}}Bi{sub 1{minus}{ital x}}){sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} single crystals with different oxygen excess {delta}. With increasing charge carrier density {ital n}{sub {ital s}}/{ital m}{sup {asterisk}}{proportional_to}1/{lambda}{sub {ital ab}}{sup 2}(0) the transition temperature at first increases, then approaches a maximum, and finally decreases. The sample independent, universal behavior found in the 1:2:3 family is not confirmed. Dependent on preparation prehistory of the samples, either linear or quadratic low temperature behavior of {lambda}{sub {ital ab}}({ital T}) was observed. A linear term is seen for samples with high maximum {ital T}{sub {ital c}}{approx_equal}94 K, while samples with quadratic behavior show a significantly reduced {ital T}{sub {ital c}}. The results are discussed in terms of {ital d}-wave superconductivity with resonant impurity scattering. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 288271
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 53; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
Similar Records
{ital a}-{ital b} Plane Microwave Surface Impedance of a High-Quality Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} Single Crystal
Temperature-dependent tunneling spectra of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} single crystals with well-defined Bi{sub 2}Sr{sub 2}CuO{sub 6} epitaxial layers