TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.19.5.140
TI  - Impurity effect and vortex cluster phase in mesoscopic type-1.5 superconductors
PY  - 2025/11/28
UR  - https://www.scipost.org/SciPostPhys.19.5.140
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 19
IS  - 5
SP  - 140
A1  - Han, Tian-Yi
AU  - Wang, Guo
AU  - Li, Jie
AU  - Huang, Hai
AB  - Based on two-band time-dependent Ginzburg-Landau theory, we study the electromagnetic properties of two-band mesoscopic superconductors. We perform the numerical simulations with the finite element method, and determine the minimum sample size $L_c$ for the existence of the type-1.5 superconductivity from the obtained phase diagram in the absence of impurity. Meanwhile in the presence of an isotropic impurity, our numerical results reveal that the vortex cluster state induced by the attractive defect potential will gradually appear in the mesoscopic system with the sample size $L < L_c$, and the critical defect strength is about 0.2 in the $T_c$ disorder model. In addition, we also investigate the effect of anisotropic defect structures and multiple correlated disorders on the patterns of magnetic vortex distributions. Our theoretical study thus indicates that the diversity of impurity depositions has a significant influence on the semi-Meissner state in mesoscopic type-1.5 superconductors.
ER  -

@Article{10.21468/SciPostPhys.19.5.140,
	title={{Impurity effect and vortex cluster phase in mesoscopic type-1.5 superconductors}},
	author={Tian-Yi Han and Guo Wang and Jie Li and Hai Huang},
	journal={SciPost Phys.},
	volume={19},
	pages={140},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.19.5.140},
	url={https://scipost.org/10.21468/SciPostPhys.19.5.140},
}