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arXiv 1705.03336cond-mat.supr-con
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手征$p$波超导体中杂质和磁场诱导的准粒子态

Impurity- and Magnetic-field-induced Quasiparticle States in Chiral $p$-wave Superconductors

Yao-Wu Guo, Wei Li, Yan Chen

摘要:

本文通过自洽求解Bogoliubov-de Gennes方程,研究了手征$p$波超导体中杂质和磁场诱导的准粒子态。在强散射极限下,我们发现对于单个磁性杂质和单个磁性杂质,都可以诱导出束缚在杂质上的普适态。此外,我们发现不同的手征序参量和相应的超电流在线性杂质周围有均匀的分布。计算了外加磁场时的局域态密度,结果表明,通过调节外加磁场或对相互作用的强度,可以显著地增强涡核中零能Majorana模的强度峰值.

英文摘要:

Both impurity- and magnetic-field-induced quasiparticle states in chiral $p$-wave superconductors are investigated theoretically by solving the Bogoliubov--de Gennes equations self-consistently. At the strong scattering limit, we find that a universal state bound to the impurity can be induced for both a single nonmagnetic impurity and a single magnetic impurity. Furthermore, we find that different chiral order parameters and the corresponding supercurrents have uniform distributions around linear impurities. Calculations of the local density of states in the presence of an external magnetic field show that the intensity peak of the zero-energy Majorana mode in the vortex core can be enhanced dramatically by tuning the strength of the external magnetic field or pairing interaction.

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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