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arXiv 1105.0860cond-mat.str-el
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外延异质结构中的应变诱导界面重构

Strain-induced interface reconstruction in epitaxial heterostructures

N. Lazarides, V. Paltoglou, P. Maniadis, G. P. Tsironis, C. Panagopoulos

摘要:

在朗道理论的框架下,我们研究了两种不同的铁弹性氧化物界面处的应变场的畸变,它们经历了结构上的双金属到四金属的相变。简单的解析解推导出在整个异质结构是全球有效的的双折射和序参量应变。结果表明,界面附近的应变呈现压缩效应,进而影响该区域的电子性质。

英文摘要:

We investigate in the framework of Landau theory the distortion of the strain fields at the interface of two dissimilar ferroelastic oxides that undergo a structural cubic-to-tetragonal phase transition. Simple analytical solutions are derived for the dilatational and the order parameter strains that are globally valid over the whole of the heterostructure. The solutions reveal that the dilatational strain exhibits compression close to the interface which may in turn affect the electronic properties in that region.

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