Tuning LaAlO3 lattice structure by growth rate at the picometer scale in LaAlO3/SrTiO3 heterostructures
Tuning LaAlO3 lattice structure by growth rate at the picometer scale in LaAlO3/SrTiO3 heterostructures
复制标题
通过 LaAlO3/SrTiO3 异质结构中皮米尺度的生长速率调整 LaAlO3 晶格结构
DOI：
10.1063/1.5035550
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发表时间：
2018-09
影响因子：
3.2
通讯作者：
Lu Yalin
中科院分区：
文献类型：
--
作者：
Wang Zhicheng;Zhai Xiaofang;Fu Zhengping;Lu Yalin
Here, we report an abnormal lattice reconstruction of LaAlO3 in the LaAlO3/SrTiO3 two-dimensional electron liquid heterostructure using the layer-by-layer pulsed laser deposition. We found that the lattice structure change of the top LaAlO3 layer is at the picometer level and is mainly controlled by the oxygen vacancies with an abnormal dependence on the oxygen background pressure. The lattice of the LaAlO3 film expands with more oxygen vacancies grown with high oxygen pressure and collapses with less oxygen vacancies grown with low oxygen pressure. The in situ monitoring of reflective high energy electron diffraction shows the lattice change coincident to the layer-by-layer deposition period change, revealing a non-equilibrium correlation between the lattice and the deposition environment, instead of the commonly assumed equilibrium correlation.Here, we report an abnormal lattice reconstruction of LaAlO3 in the LaAlO3/SrTiO3 two-dimensional electron liquid heterostructure using the layer-by-layer pulsed laser deposition. We found that the lattice structure change of the top LaAlO3 layer is at the picometer level and is mainly controlled by the oxygen vacancies with an abnormal dependence on the oxygen background pressure. The lattice of the LaAlO3 film expands with more oxygen vacancies grown with high oxygen pressure and collapses with less oxygen vacancies grown with low oxygen pressure. The in situ monitoring of reflective high energy electron diffraction shows the lattice change coincident to the layer-by-layer deposition period change, revealing a non-equilibrium correlation between the lattice and the deposition environment, instead of the commonly assumed equilibrium correlation.
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影响因子：
2.7
作者：
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通讯作者：
B. Zou;P. Petrov;N. Alford
影响因子：
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DOI：
10.1016/j.elspec.2004.02.079
发表时间：
2004-07
影响因子：
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影响因子：
3.7
作者：
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通讯作者：
Chambers, S. A.
影响因子：
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作者：
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通讯作者：
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