6533b860fe1ef96bd12c2fa8

RESEARCH PRODUCT

Comment on the paper by D. Efremov and Yu.N. Ovchinnikov "Singular ground state of multiband inhomogeneous superconductors", Phys. Rev. B 99, 224508 (2019)

Mihail SilaevThomas WinyardEgor Babaev

subject

Superconductivity (cond-mat.supr-con)Condensed Matter::SuperconductivityCondensed Matter - SuperconductivityFOS: Physical sciences

description

We show that the conclusion reported in Ref. 1, that there are no spontaneous magnetic fields in multiband superconductors that break time reversal symmetry, is incorrect. We demonstrate that the state proposed in Ref. 1 is not a solution of the Ginzburg-Landau equations for the considered model. The reason is that in Ref. 1 one of the Ginzburg-Landau equations is neglected and substituted by the spurious zero current restriction. This restriction together with all of the Ginzburg-Landau equations leads to an overdetermined system which does not have a solution. This inconsistency invalidates all the results of the paper.

yearjournalcountryeditionlanguage
2019-08-22
http://arxiv.org/abs/1908.08459