Observation of a common symmetry for the pseudogap and the superconducting order parameter near the surface of underdoped YBa2Cu3O6+x

被引：7

作者：

Koren, G ^{[1
]}

Shkedy, L ^{[1
]}

Polturak, E ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 403卷 / 1-2期

基金：

以色列科学基金会;

关键词：

pseudogap; d-wave superconductor; energy gap; weak links;

D O I：

10.1016/j.physc.2003.11.012

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Measurements of the angular dependence of conductance spectra in the a-b plane of underdoped YBa2Cu3O6+x junctions are reported. At zero magnetic field the superconducting gap shows a \d + is\-like symmetry. Application of a magnetic field strongly suppresses this gap leaving only the pseudogap feature which also shows a \d + is\-like angular dependence. We thus observe the same symmetry for the superconducting gap and the pseudogap characterizing the YBCO electrodes near the interface with the barrier. An H-c2 value of similar to5 T of the secondary (is) order parameter can also be deduced from our results. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：45 / 51

页数：7

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