Morphology and optical properties of MgO thin films on Mo(001)

被引：71

作者：

Benedetti, S.

Benia, H. M.

Nilius, N.

Valeri, S.

Freund, H. J.

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[2] Univ Modena, Dipartimento Fis, I-41100 Modena, Italy

[3] CNR, INFM, Natl Res Ctr NanoStruct & BioSyst Surfaces, I-41100 Modena, Italy

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 430卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2006.08.130

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thin MgO films with a nominal thickness ranging between 1 and 60 ML have been grown on a Mo(001) surface. The film morphology was studied by LEED and STM, revealing the presence of a coincidence pattern with the Mo support in the low coverage regime, a dislocation network at medium thickness and a rather flat and defect-poor MgO surface for thicker layers. The MgO optical properties were investigated as a function of film thickness by analyzing electro-luminescence spectra obtained via electron injection from the STM tip into well-defined surface areas. The spectra are characterized by two distinct emission bands at 3.1 and 4.4 eV. Their origin is discussed in the light of earlier photo-luminescence measurements on MgO nanocubes and smokes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：330 / 335

页数：6

共 33 条

[31] Effects of electron irradiation on the structure and morphology of CaF2/Si(111) [J].