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arXiv 0903.2800cond-mat.supr-con
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超导球壳上Meissner态与涡旋态的共存

Co-existence of the Meissner and vortex-state on a superconducting spherical shell

J. Tempere, V. N. Gladilin, I. F. Silvera, J. T. Devreese, V. V. Moshchalkov

摘要:

我们发现,在超导球形纳米壳层上,迈斯纳态与各种涡旋模式的共存驱动了向更高磁场的相变。球形几何形状导致马格努斯-洛伦兹力将成核涡旋和反涡旋推向极点,克服局部钉扎中心,防止涡旋-反涡旋复合,并导致在球体赤道周围出现迈斯纳带。在足够小和薄的球壳中,顺磁涡旋状态可以是稳定的,使得在不均匀的外部磁场中具有不同半径和涡旋的自由移动的壳能够空间分离。

英文摘要:

We show that on superconducting spherical nanoshells, the co-existence of the Meissner state with a variety of vortex patterns drives the phase transition to higher magnetic fields. The spherical geometry leads to a Magnus-Lorentz force pushing the nucleating vortices and antivortices towards the poles, overcoming local pinning centers, preventing vortex-antivortex recombination and leading to the appearance of a Meissner belt around the sphere's equator. In sufficiently small and thin spherical shells paramagnetic vortex states can be stable, enabling spatial separation of freely moving shells with different radii and vorticity in an inhomogeneous external magnetic field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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