玻色超流体中涡旋非解析核重构引起的Abrikosov晶格不稳定性
Instability of Abrikosov lattice due to nonanalytic core reconstruction of vortices in Bosonic superfluids
摘要：
研究了弱耦合超流体中涡核的非解析重构对静态涡结构的影响。我们表明，在旋转的二维系统中，Abrikosov涡格是不稳定的涡核变形：每个零的波函数成为一个有限长度的削减。由于表面效应或与晶格的剪切变形（螺旋结构）的相互作用，表征切割方向的董事本身在超结构中是有序的。在干净的超导薄膜中也可以观察到类似的不稳定性。
英文摘要：
We study the impact of the non-analytic reconstruction of vortex cores on static vortex structures in weakly coupled superfluids. We show that in rotating two-dimensional systems, the Abrikosov vortex lattice is unstable to vortex core deformation: Each zero of the wave function becomes a cut of finite length. The directors characterizing the orientations of the cuts are themselves ordered in superstructures due either to surface effects or to interaction with shear deformations of the lattice (spiral structure). Similar instability may be also observable in clean superconducting films.
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