Thermodynamic fluctuations in the high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>perovskite superconductors
A. KapitulnikDepartment of Applied Physics, Stanford University, Stanford, California 94305M. R. BeasleyDepartment of Applied Physics, Stanford University, Stanford, California 94305C. CastellaniDepartment of Applied Physics, Stanford University, Stanford, California 94305C. Di CastroDepartment of Applied Physics, Stanford University, Stanford, California 94305
1988lv
ABI
Annotatsiya
The role of fluctuations in the breakdown of mean-field theory in the new high-${T}_{c}$ perovskite superconductors is analyzed. Both the breakdown of the classical critical exponents (the Ginzburg criterion) and the quantitative breakdown of mean-field theory (the Brout criterion) are discussed. It is found that for certain sets of observed parameters for these materials, a breakdown of mean-field theory is to be expected.
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