Tunneling spectroscopy of the quasiparticle Andreev bound state in ion-irradiated YBa2Cu3O7-δ/Pb junctions

被引：69

作者：

Aprili, M ^{[1
]}

Covington, M ^{[1
]}

Paraoanu, E ^{[1
]}

Niedermeier, B ^{[1
]}

Greene, LH ^{[1
]}

机构：

[1] Univ Illinois, Loomis Lab Phys, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.57.R8139

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of disorder on the in-plane density of states of YBa2Cu3O7-delta are investigated by planar tunneling spectroscopy. Low-fluence 1-MeV He+ irradiation reduces the YBa2Cu3O7-deltaTc and mean-free path without altering the junction quality. As the dirty limit is approached, the zero-bias conductance peak (ZBCP) disappears, as expected for a quasiparticle Andreev bound state. Thus, the quasiparticle scattering rate may be determined by the ZBCP magnitude. This rate is a direct measure of the pair-breaking strength and accounts for the T-c suppression.

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收藏

页码：R8139 / R8142

页数：4

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