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arXiv 0901.1774cond-mat.supr-con
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d波超导体YBa2Cu3O {7-x}结面上的Bean-Livingston势垒增强

Bean-Livingston barrier enhancement on nodal surface of the d-wave superconductor YBa2Cu3O{7-x}

G. Leibovitch, R. Beck, A. Kohen, G. Deutscher

摘要:

通过隧穿Andreev-Saint-James束缚态研究了(110)取向$_2$ $_3$ O $_{7-x}$薄膜中的涡旋进入,表面电流使束缚态的能量移动.在低温下,已发现的特征字段的涡旋入口增加到几倍以上的值比豆利文斯顿进入字段的传统超导体,在最近的理论预测一致。

英文摘要:

Vortex entry into (110) oriented YBa$_2$Cu$_3$O$_{7-x}$ films has been studied by tunneling into Andreev - Saint-James bound states, whose energy is shifted by surface currents. At low temperatures, the characteristic field for vortex entry has been found to increase up to values several times higher than that of the Bean-Livingston entry field for conventional superconductors, in agreement with recent theoretical predictions.

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