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
收藏
页码：1536 / 1539
页数：4
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