The observation of a surface resonance state in the valence-band structure of the perovskite La0.65Ba0.35MnO3

被引：16

作者：

Waldfried, C ^{[1
]}

McIlroy, DN ^{[1
]}

Liou, SH ^{[1
]}

Sabiryanov, R ^{[1
]}

Jaswal, SS ^{[1
]}

Dowben, PA ^{[1
]}

机构：

[1] UNIV NEBRASKA,CTR MAT RES & ANAL,LINCOLN,NE 68588

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1997年 / 9卷 / 05期

关键词：

D O I：

10.1088/0953-8984/9/5/009

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The valence-band electronic structure of a crystalline thin film of La0.65Ba0.35MnO3 has been investigated using angle-resolved photoemission. The observed valence-band structure has a substantial surface contribution and is strongly influenced by the surface conditions. Surface contamination and disorder attenuate the emission from a Mn-3d-derived state at a binding energy of 3.3 eV. This state was found to bt localized at the surface with dispersion only in the plane of the surface and exhibited a strong intensity dependence on emission angle. On the basis of a simple LMTO-ASA bulk band calculation, it is clear that this state does not fall within a bulk band gap. We have therefore identified this Mn-3d-derived state at 3.3 eV below E(F) as a surface resonance.

引用

页码：1031 / 1038

页数：8

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