Scanning-tunneling-microscopy study of faceting on high-step-density TaC surfaces

被引：6

作者：

Zuo, JK

Carpinelli, JM

Zehner, DM

Wendelken, JF

机构：

[1] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104

[2] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.53.16013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the morphologies of the TaC(310), (210), and (110) surfaces using scanning tunneling microscopy. Heating the crystals to high temperatures activates a faceting of these surfaces into a hill-and-valley structure consisting of enlarged (100) terraces and (010) step walls. Step-separation distributions obtained from these surfaces can be well fit by sharp Gaussians and are much narrower than predicted for the noninteracting terrace-step-kink model, indicating a strong repulsive interaction exists between steps on the faceted surfaces. This faceting is suggested to be driven by a decrease in the total step repulsive energy through a reduction of the total number of step pairs.

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收藏

页码：16013 / 16018

页数：6

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