TY - JOUR
T1 - Atomic-scale structure and electronic property of the La 2FeCrO6/SrTiO3 interface
AU - Lv, Shuhui
AU - Saito, Mitsuhiro
AU - Wang, Zhongchang
AU - Chen, Chunlin
AU - Chakraverty, Suvankar
AU - Kawasaki, Masashi
AU - Ikuhara, Yuichi
N1 - Funding Information:
This work was conducted in the Research Hub for Advanced Nano Characterization at the Univ. of Tokyo supported by the MEXT of Japan. S.L. thanks the Grant-in-Aid for JSPS fellows (Grant No. 23•01799). Z.W. appreciates the financial supports from the Grant-in-Aid for Young Scientists (A) (Grant No. 24686069), the Challenging Exploratory Research (Grant No. 24656376), the Sasakawa Scientific Research Grant, and the JGC-S Scholarship Foundation. S.C. and M.K. acknowledge support by the JSPS through the “Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)”. M.K. thanks the JSPS Grant-in-Aid for Scientific Research (S) (Grant No. 24226002). Calculations were carried out at the ISSP, Univ. of, Tokyo.
PY - 2013/9/21
Y1 - 2013/9/21
N2 - Combining transmission electron microscopy with first-principles calculations, we investigate atomic-scale structure of a La 2FeCrO6/SrTiO3 interface and related it to its electronic properties at the atomic scale with special focus on the strain effect. We find that the La2FeCrO6 film shows a clean and direct contact to the substrate and that an epitaxial, coherent and atomically sharp interface is formed between La2FeCrO6 and SrTiO 3. By estimating the adhesion energies for 21 possible candidate interface geometries, we determine the most stable interface structure theoretically, in consistence with the experimental data. The strain is found to play an insignificant role in affecting interfacial atomic structures, yet impose a substantial electronic impact. The strain induces interfacial electronic states and is responsible for the covalent nature of the interfacial bonding. Moreover, the valence states of Fe and Cr are identified to be +3, and a ferrimagnetic coupling is revealed between Fe and Cr.
AB - Combining transmission electron microscopy with first-principles calculations, we investigate atomic-scale structure of a La 2FeCrO6/SrTiO3 interface and related it to its electronic properties at the atomic scale with special focus on the strain effect. We find that the La2FeCrO6 film shows a clean and direct contact to the substrate and that an epitaxial, coherent and atomically sharp interface is formed between La2FeCrO6 and SrTiO 3. By estimating the adhesion energies for 21 possible candidate interface geometries, we determine the most stable interface structure theoretically, in consistence with the experimental data. The strain is found to play an insignificant role in affecting interfacial atomic structures, yet impose a substantial electronic impact. The strain induces interfacial electronic states and is responsible for the covalent nature of the interfacial bonding. Moreover, the valence states of Fe and Cr are identified to be +3, and a ferrimagnetic coupling is revealed between Fe and Cr.
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U2 - 10.1063/1.4821795
DO - 10.1063/1.4821795
M3 - Article
AN - SCOPUS:84887475742
VL - 114
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 11
M1 - 113705
ER -