STM studies of individual Ti impurity atoms in Sr2RuO4

被引：17

作者：

Barker, BI

Dutta, SK

Lupien, C

McEuen, PL

Kikugawa, N

Maeno, Y

Davis, JC

机构：

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

[2] Cornell Univ, Dept Phys, Ithaca, NY 14853 USA

[3] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 329卷

关键词：

scanning tunneling microscope; STM; Sr2RuO4; impurity;

D O I：

10.1016/S0921-4526(02)02158-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The unconventional superconductor, Sr2RuO4, was studied with an ultra-low temperature scanning tunneling microscope. Atomic resolution images of the SrO plane were obtained with perturbations caused by Ti impurities substituted for 0.125% of the Ru atoms clearly visible. A complicated gap-like structure in local density of states was measured at all locations on the surface, with some modifications caused by the Ti atoms. The superconducting gap was not clearly visible, possibly due to surface termination effects, but other gap-like structures were found at similar to5 and similar to50 meV. (C) 2003 Elsevier Science B.V. All rights reserved.

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页码：1334 / 1335

页数：2

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