Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China.
J Phys Condens Matter. 2014 Mar 19;26(11):115702. doi: 10.1088/0953-8984/26/11/115702. Epub 2014 Mar 3.
We study the superconducting vortex states induced by the interplay of long-range Pearl repulsion and short-range intervortex attraction using Langevin dynamics simulations. We show that at low temperatures the vortices form an ordered Abrikosov lattice both in low and high fields. The vortices show distinctive modulated structures at intermediate fields depending on the effective intervortex attraction: ordered vortex chain and kagome-like vortex structures for weak attraction; bubble, stripe and antibubble lattices for strong attraction. Moreover, in the regime of the chain state, the vortices display structural transitions from chain to labyrinthine (or disordered chain) and/or to disordered states depending on the strength of the disorder.
我们使用朗之万动力学模拟研究了长程 Pearl 排斥和短程涡旋吸引相互作用诱导的超导涡旋态。我们表明，在低温下，涡旋在低场和高场中都形成了有序的 Abrikosov 晶格。涡旋在中间场表现出独特的调制结构，具体取决于有效涡旋吸引：对于较弱的吸引，为有序的涡旋链和 kagome 状的涡旋结构；对于较强的吸引，为气泡、条纹和反气泡晶格。此外，在链态的范围内，根据无序的强度，涡旋会从链结构发生结构转变，变成迷宫状（或无序链）和/或无序状态。
