Antivortices due to competing orbital and paramagnetic pair-breaking effects

Pramana

U Klein1¹ 

[1] Johannes Kepler Universität Linz, Institut für Theoretische Physik, A-4040 Linz, Austria$$

关键词: Superconductivity;    antivortices;    paramagnetic pair-breaking;    orbital pair-breaking.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Thermodynamically stable vortex-antivortex structures in a quasi-two-dimensional superconductor in a tilted magnetic field are predicted. For this geometry, both orbital and spin pair-breaking effects exist, with their relative strength depending on the tilt angle 𝜇. The spectrum of possible states contains the ordinary vortex state (for large 𝜇) and the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state (for 𝜃 = 0) as limits. The quasi-classical equations are solved near 𝐻c2 for arbitrary 𝜃 and it is shown that stable states with co-existing vortices and antivortices exist in a small interval close to 𝜃 = 0. The results are compared with recent predictions of antivortices in mesoscopic samples.

【 授权许可】

Unknown