Ti 2p and O 1s X-ray absorption of TiO2 polymorphs

被引：103

作者：

Ruus, R

Kikas, A

Saar, A

Ausmees, A

Nommiste, E

Aarik, J

Aidla, A

Uustare, T

Martinson, I

机构：

[1] UNIV UPPSALA,DEPT PHYS,S-75121 UPPSALA,SWEDEN

[2] UNIV OULU,DEPT PHYS SCI,FIN-90570 OULU,FINLAND

[3] TARTU STATE UNIV,INST MAT SCI,EE-2400 TARTU,ESTONIA

[4] LUND UNIV,DEPT ATOM SPECT,S-22362 LUND,SWEDEN

来源：

SOLID STATE COMMUNICATIONS | 1997年 / 104卷 / 04期

关键词：

insulators; thin films; NEXAFS; crystal and ligand fields;

D O I：

10.1016/S0038-1098(97)00300-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present and discuss the Ti 2p and O 1s X-ray absorption spectra (XAS) and resonant photoelectron emission spectra (RPES) of the various polymorphic forms (TiO2-II, rutile and anatase) of TiO2. The largest differences between the Ti 2p XAS of polymorphs of TiO2 are observed in the region of the double peak structure of the L-3 edge. A strong delocalization of the excited 3d electron in this region is concluded from the RPES at the L-3 threshold of Ti. The differences in XAS are attributed to increasing strength of the crystal field caused by delocalization of the excited 3d electron. (C) 1997 Elsevier Science Ltd.

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页码：199 / 203

页数：5

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