期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.237002
关键词
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资金
- Academy of Finland [123311]
- UK Engineering and Physical Sciences Research Council
- EPSRC [EP/G009678/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G009678/1] Funding Source: researchfish
- Academy of Finland (AKA) [123311, 123311] Funding Source: Academy of Finland (AKA)
We demonstrate that, in contrast with the single-component Abrikosov vortex, in two-component superconductors vortex solutions with an exponentially screened magnetic field exist only in exceptional cases: in the case of vortices carrying an integer number of flux quanta and in a special parameter limit for half-quantum vortices. For all other parameters, the vortex solutions have a delocalized magnetic field with a slowly decaying tail. Furthermore, we demonstrate a new effect which is generic in two-component systems but has no counterpart in single-component systems: on exactly half of the parameter space of the U(1)xU(1) Ginzburg-Landau model, the magnetic field of a generic fractional vortex inverts its direction at a certain distance from the vortex core.
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