Observation of a transverse Meissner effect in CuxTiSe2 single crystals

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTORS;    LOCK-IN;    OXIDE SUPERCONDUCTORS;    TWIN BOUNDARIES;    VORTEX;    CROSSOVER;    VORTICES;    STATE;    LINE;   

DOI  :  10.1103/PhysRevB.93.100501

来源: SCIE

【 摘 要 】

We report on local magnetization measurements showing the presence of an unexpectedly strong transverse Meissner effect in the superconducting CuxTiSe2 single crystals. We show that for tilted magnetic fields (H-a) vortices remain aligned with the ab planes up to field H-k similar to H-p/sin theta(H) (where theta(H) is the angle between the applied field and the ab plane and H-p the first penetration field) and that for H-a > H-k, the field dependence of the vortex direction theta(B)(H-a) can be well described assuming that vortices remain partially locked in the planes forming a staircase structure of average direction theta(B) not equal theta(H). These results indicate the existence of a strong modulation of the vortex core energy along the c axis but its origin remains unclear.

【 授权许可】

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