Surface crystallography and electronic structure of potassium yttrium tungstate

被引：78

作者：

Atuchin, V. V. ^{[3
]}

Pokrovsky, L. D. ^{[3
]}

Khyzhun, O. Yu. ^{[4
]}

Sinelnichenko, A. K. ^{[4
]}

Ramana, C. V. ^{[1
,2
]}

机构：

[1] Univ Texas El Paso, Dept Met & Mat Engn, El Paso, TX 79968 USA

[2] Univ Texas El Paso, Dept Elect & Comp Engn, El Paso, TX 79968 USA

[3] SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia

[4] NAS Ukraine, Frantsevych Inst Problems Mat Sci, UA-03142 Kiev, Ukraine

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 03期

关键词：

D O I：

10.1063/1.2963957

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Structural and electronic characteristics of KY(WO4)(2) (KYW) (010) crystal surfaces have been studied using reflection high-energy electron diffraction (RHEED) and x-ray photoelectron spectroscopy (XPS). The results indicate that the crystal structure and chemical composition of the mechanically polished pristine surface is stoichiometrically well maintained as expected for KYW crystals. Combined measurements of RHEED and XPS as a function of 1.5 keV Ar+ ion irradiation of the KYW (010) surfaces indicate amorphization, partial loss of potassium atoms, and partial transformation of chemical valence state of tungsten from W6+ to a lower valence state, W-0 state predominantly, which induces electronic states at the top of valence band. (C) 2008 American Institute of Physics.

引用

页数：6

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