Electrostatic force microscopy on oriented graphite surfaces:: Coexistence of insulating and conducting behaviors

被引：67

作者：

Lu, Yonghua ^{[1
]}

Munoz, M.

Steplecaru, C. S.

Hao, Cheng

Bai, Ming

Garcia, N.

Schindler, K.

Esquinazi, P.

机构：

[1] CSIC, Lab Fis Sistemas Pequenos & Nanotecnol, Serrano 144, Madrid 28006, Spain

[2] Univ Leipzig, Div Superconductiv & Magnetism, D-04103 Leipzig, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.97.076805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of the electric potential fluctuations on the surface of highly oriented pyrolytic graphite using electrostatic force and atomic force microscopy. Micrometric domainlike potential distributions are observed even when the sample is grounded. Such potential distributions are unexpected given the good metallic conductivity of graphite because the surface should be an equipotential. Our results indicate the coexistence of regions with "metalliclike" and "insulatinglike" behaviors showing large potential fluctuations of the order of 0.25 V. In lower quality graphite, this effect is not observed. Experiments are performed in Ar and air atmospheres.

引用

页数：4

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