Nanorelief of an oxidized cleaved surface of a grid of alternating Ga0.7Al0.3As and GaAs heterolayers

被引：25

作者：

Ankudinov, AV ^{[1
]}

Evtikhiev, VP ^{[1
]}

Tokranov, VE ^{[1
]}

Ulin, VP ^{[1
]}

Titkov, AN ^{[1
]}

机构：

[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

SEMICONDUCTORS | 1999年 / 33卷 / 05期

关键词：

Oxide; Microscopy; GaAs; Magnetic Material; Oxide Film;

D O I：

10.1134/1.1187727

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The morphology of an oxidized cleaved surface of a grid of alternating GaAs and Ga0.7Al0.3As layers was investigated by atomic-force microscopy. It was found that the surface of the native oxide film on a cleaved surface possesses a quasistationary nanorelief that reflects the composition of the layers of the heterostructure. The oxide regions above the GaAlAs layers are 0.5 nm higher than the regions above the GaAs layers. Etching off the oxide film shows that a nanorelief, which is inverted with respect to the relief of the oxide surface, also forms on the bared cleaved surface. The appearance of nanoreliefs on the surface and at the bottom boundary of the native oxide film is explained by the different oxidation depths of GaAs and Ga0.7Al0.3As and by an oxidation-induced increase in the volume. (C) 1999 American Institute of Physics. [S1063-7826(99)01505-7].

引用

页码：555 / 558

页数：4

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