Antiferromagnetic domains and superconductivity in UPt3
Matthias J. Graf, Daryl W. Hess
DOI 10.1103/PhysRevB.63.134502 · Physical Review B
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Abstract
We explore the response of an unconventional superconductor to spatially inhomogeneous antiferromagnetism (SIAFM). Symmetry allows the superconducting order parameter in the E-representation models for UPt3 to couple directly to the antiferromagnetic (AFM) order parameter. The Ginzburg-Landau equations for coupled superconductivity and SIAFM are solved numerically for two possible SIAFM configurations: Model I, abutting antiferromagnetic domains of uniform size; and Model II, quenched random disorder of “nanodomains” in a uniform AFM background. We discuss the contributions to the free energy, specific heat, and order parameter for these models. Neither model provides a satisfactory account of experiment, but results from the two models differ significantly. Our results demonstrate that the response of an E2u superconductor to SIAFM is strongly dependent on the spatial dependence of AFM order; no conclusion can be drawn regarding the compatibility of E2u superconductivity with UPt3 that is independent of assumptions on the spatial dependence of antiferromagnetism.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | Pressure unresolved | unknown |
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