Surface core-level shifts of strontium observed in photoemission of barium strontium titanate thin films

被引：65

作者：

Baniecki, J. D.

Ishii, M.

Shioga, T.

Kurihara, K.

Miyahara, S.

机构：

[1] Fujitsu Ltd, Atsugi, Kanagawa 2430197, Japan

[2] Fujitsu Labs Ltd, Atsugi, Kanagawa 2430197, Japan

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 16期

关键词：

D O I：

10.1063/1.2357880

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Angle resolved x-ray photoelectron spectroscopy was used to investigate the surface electronic structure of barium strontium titanate (BST) films. In contrast to previous photoemission studies which identified two chemical states associated with only Ba in the near surface region, the authors have resolved core-level features from surface Sr atoms which provide new insight into the surface electronic structure of BST thin films. The surface Sr 3d features are found to lie approximately 1 eV higher in binding energy than the bulk derived peaks. The effects of aqueous and annealing surface treatments and the origin of the Sr surface core-level shifts are discussed.

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页数：3

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