作者
Egor Babaev, J Carlström, Mihail Silaev, JM Speight
发表日期
2017/2/15
期刊
Physica C: Superconductivity and its applications
卷号
533
页码范围
20-35
出版商
North-Holland
简介
In general a superconducting state breaks multiple symmetries and, therefore, is characterized by several different coherence lengths ξ i, i= 1,…, N. Moreover in multiband material even superconducting states that break only a single symmetry are nonetheless described, under certain conditions by multi-component theories with multiple coherence lengths. As a result of that there can appear a state where some coherence lengths are smaller and some are larger than the magnetic field penetration length λ: ξ 1≤ ξ 2…< 2 λ< ξ M≤… ξ N. That state was recently termed “type-1.5” superconductivity. This breakdown of type-1/type-2 dichotomy is rather generic near a phase transition between superconducting states with different symmetries. The examples include the transitions between U (1) and U (1)× U (1) states or between U (1) and U (1)× Z 2 states. The later example is realized in systems that feature transition …
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学术搜索中的文章
E Babaev, J Carlström, M Silaev, JM Speight - Physica C: Superconductivity and its applications, 2017