STM studies of the electronic structure of vortex cores in Bi2Sr2CaCu2O8+δ

被引：269

作者：

Pan, SH ^{[1
]}

Hudson, EW

Gupta, AK

Ng, KW

Eisaki, H

Uchida, S

Davis, JC

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[3] Univ Tokyo, Dept Supercond, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.85.1536

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on low temperature scanning tunneling microscopy (STM) studies of the electronic structure of vortex cores in Bi2Sr2CaCu2O8+delta. At the vortex core center, an enhanced density of states is observed at energies near Omega = +/-7 meV. Spectroscopic imaging at these energies reveals an exponential decay of these "core states" with a decay length of 22 +/- 3 Angstrom. The fourfold symmetry sometimes predicted for d-wave vortices is not seen in spectroscopic vortex images. A locally nodeless order parameter induced by the magnetic field may be consistent with these measurements.

引用

页码：1536 / 1539

页数：4

共 36 条

[1] Superconducting vortex with antiferromagnetic core [J].