Negative electron affinity of cubic boron nitride

被引：16

作者：

Loh, KP ^{[1
]}

Sakaguchi, I ^{[1
]}

Nishitani-Gamo, M ^{[1
]}

Taniguchi, T ^{[1
]}

Ando, T ^{[1
]}

机构：

[1] Natl Inst Res Inorgan Mat, Japan Sci & Technol Corp, CREST, Ibaraki, Osaka 3050044, Japan

来源：

关键词：

cubic boron nitride; high pressure high temperature; spectroscopy; surface;

D O I：

10.1016/S0925-9635(98)00293-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have verified that the condition of negative electron affinity (NEA) exists on both single crystal cubic boron nitride (001)-(1x1) and polycrystalline cubic boron nitride (c-BN). The NEA condition has been linked to the presence of chemisorbed hydrogen on the surface. Annealing the c-BN to temperatures in excess of 1200 degrees C converts the surface to a positive electron affinity condition, which is believed to be due to the desorption of hydrogen from the surface. Subsequent exposure of the annealed surface to atomic hydrogen or cesium metal can regenerate the NEA condition. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：781 / 784

页数：4

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