Magnetic Scaling in Superconductors

Ian D. Lawrie

doi:10.1103/PhysRevLett.79.131

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Magnetic Scaling in Superconductors

Ian D. Lawrie

DOI 10.1103/PhysRevLett.79.131 · Physical Review Letters

T1

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Abstract

The Ginzburg-Landau-Wilson superconductor in a magnetic field B is considered in the approximation that magnetic-field fluctuations are neglected. A formulation of perturbation theory is presented in which multiloop calculations fully retaining all Landau levels are tractable. A 2-loop calculation shows that, near the zero-field critical point, the singular part of the free energy scales as Fsing≈|t|2−αF(B|t|−2ν), where ν is the coherence-length exponent—a result which has hitherto been assumed on purely dimensional grounds.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBaCuO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown