Polarity compensation in ultra-thin films of complex oxides: the case of a perovskite nickelate.
Polarity compensation in ultra-thin films of complex oxides: the case of a perovskite nickelate.
复制标题
复合氧化物超薄膜的极性补偿:钙钛矿镍酸盐的情况。
DOI:
10.1038/srep06819
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发表时间:
2014-10-29
影响因子:
4.6
通讯作者:
Chakhalian J
中科院分区:
文献类型:
--
作者:
Middey S;Rivero P;Meyers D;Kareev M;Liu X;Cao Y;Freeland JW;Barraza-Lopez S;Chakhalian J
We address the fundamental issue of growth of perovskite ultra-thin films under the condition of a strong polar mismatch at the heterointerface exemplified by the growth of a correlated metal LaNiO3 on the band insulator SrTiO3 along the pseudo cubic [111] direction. While in general the metallic LaNiO3 film can effectively screen this polarity mismatch, we establish that in the ultra-thin limit, films are insulating in nature and require additional chemical and structural reconstruction to compensate for such mismatch. A combination of in-situ reflection high-energy electron diffraction recorded during the growth, X-ray diffraction, and synchrotron based resonant X-ray spectroscopy reveal the formation of a chemical phase La2Ni2O5 (Ni2+) for a few unit-cell thick films. First-principles layer-resolved calculations of the potential energy across the nominal LaNiO3/SrTiO3 interface confirm that the oxygen vacancies can efficiently reduce the electric field at the interface.
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影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
影响因子:
3.7
作者:
Liu, Jian;Okamoto, S.;Chakhalian, J.
通讯作者:
Chakhalian, J.
影响因子:
3.7
作者:
Abbate, M;Zampieri, G;Vallet-Regi, M
通讯作者:
Vallet-Regi, M
DOI:
10.1039/dt9950002819
发表时间:
1995-09-07
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
影响因子:
--
作者:
ALONSO, JA;MARTINEZLOPE, MJ
通讯作者:
MARTINEZLOPE, MJ
DOI:
10.1039/f29837901181
发表时间:
1983-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II
影响因子:
--
作者:
CRESPIN, M;LEVITZ, P;GATINEAU, L
通讯作者:
GATINEAU, L