Comment on "Ginzburg-Landau theory of two-band superconductors: Absence of type-1.5 superconductivity"

被引：23

作者：

Babaev, Egor ^{[1
,2
]}

Silaev, Mihail ^{[2
,3
]}

机构：

[1] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[2] Royal Inst Technol, Dept Theoret Phys, S-10691 Stockholm, Sweden

[3] RAS, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 01期

基金：

美国国家科学基金会;

关键词：

2-GAP SUPERCONDUCTORS; HYDROGEN; VORTICES;

D O I：

10.1103/PhysRevB.86.016501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The recent paper by V. G. Kogan and J. Schmalian [Phys. Rev. B 83, 054515 (2011)] argues that the widely used two-component Ginzburg-Landau (GL) models are not correct, and further concludes that in the regime which is described by a GL theory there could be no disparity in the coherence lengths of two superconducting components. This would in particular imply that [in contrast to U(1) x U(1) superconductors] there could be no "type-1.5" superconducting regime in U(1) multiband systems for any finite interband coupling strength. We point out that these claims are incorrect and based on an erroneous scheme of reduction of a two-component GL theory.

引用

页数：4

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