Singular ground state of multiband inhomogeneous superconductors
Yu. N. Ovchinnikov, D. V. Efremov
DOI 10.1103/PhysRevB.99.224508 · Physical Review B
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Abstract
The interplay between interband and intraband pairing interactions in multiband systems can result in superconducting order parameter with the broken time-reversal symmetry (BTRS). Here we consider a slightly inhomogeneous superconductor with the BTRS order parameter in the framework of Ginzburg-Landau functional. We show that the Giznburg-Landau functional possesses a minimum with zero spontaneous internal magnetic fields in the absence of the external magnetic fields. This extension of the functional space is important for understanding of experimental situation in multiband superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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