Topological objects in two-gap superconductor

doi:10.1140/epjb/e2008-00343-2

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	Topological objects in two-gap superconductor
	Cho, Y. M.1,2; Zhang, P. M.3
刊名	EUROPEAN PHYSICAL JOURNAL B
	2008-09-01
卷号	65 期号:2 页码:155-178
ISSN号	1434-6028
DOI	10.1140/epjb/e2008-00343-2
英文摘要	We discuss the non-Abelian topological objects, in particular the non-Abrikosov vortex and the magnetic knot made of the twisted non-Abrikosov vortex, in two-gap superconductor. We show that there are two types of non-Abrikosov vortex in Ginzburg-Landau theory of two-gap superconductor, the D-type which has no concentration of the condensate at the core and the N-type which has a non-trivial profile of the condensate at the core, under a wide class of realistic interaction potential. We prove that these non-Abrikosov vortices can have either integral or fractional magnetic flux, depending on the interaction potential. We show that they are described by the non-Abelian topology pi(2)(S-2) and pi(1)(S-1), in addition to the well-known Abelian topology pi(1)(S-1). Furthermore, we discuss the possibility to construct a stable magnetic knot in two-gap superconductor by twisting the non-Abrikosov vortex and connecting two periodic ends together, whose knot topology pi(3)(S-2) is described by the Chern-Simon index of the electromagnetic potential. We argue that similar topological objects may exist in multi-gap or multi-layer superconductors and multi-component Bose-Einstein condensates and superfluids, and discuss how these topological objects can be constructed in MgB2, Sr2RuO4, He-3, and liquid metallic hydrogen.
资助项目	ABRL Program of Korea Science and Engineering Foundation[R02-2003-00010043-0] ; BSR Program of Korea Research Foundation[KRF-2007-314-C00055] ; National Natural Science Foundation of China[10604024]
WOS关键词	CLASSICAL FIELD-THEORY ; GAUGE-THEORY ; SUPERFLUID HE-3 ; VORTEX ; VORTICES ; PHASE ; KNOT ; SPECTRUM ; STRINGS ; NUMBER
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000259770600001
资助机构	ABRL Program of Korea Science and Engineering Foundation ; BSR Program of Korea Research Foundation ; National Natural Science Foundation of China
公开日期	2010-10-29
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/5687]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Cho, Y. M.
作者单位	1.Seoul Natl Univ, Coll Nat Sci, Ctr Theoret Phys, Seoul 151742, South Korea 2.Seoul Natl Univ, Coll Nat Sci, Sch Phys, Seoul 151742, South Korea 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Cho, Y. M.,Zhang, P. M.. Topological objects in two-gap superconductor[J]. EUROPEAN PHYSICAL JOURNAL B,2008,65(2):155-178.
APA	Cho, Y. M.,&Zhang, P. M..(2008).Topological objects in two-gap superconductor.EUROPEAN PHYSICAL JOURNAL B,65(2),155-178.
MLA	Cho, Y. M.,et al."Topological objects in two-gap superconductor".EUROPEAN PHYSICAL JOURNAL B 65.2(2008):155-178.