Chang, C. F., Hu, Z., Klein, S., Liu, X. H., Sutarto, R., Tanaka, A., Cezar, J. C., Brookes, N. B., Lin, H. -J., Hsieh, H. H., Chen, C. T., Rata, A. D. and Tjeng, L. H. (2016). Dynamic Atomic Reconstruction: How Fe3O4 Thin Films Evade Polar Catastrophe for Epitaxy. Phys. Rev. X, 6 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2160-3308

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Abstract

Polar catastrophe at the interface of oxide materials with strongly correlated electrons has triggered a flurry of new research activities. The expectations are that the design of such advanced interfaces will become a powerful route to engineer devices with novel functionalities. Here, we investigate the initial stages of growth and the electronic structure of the spintronic Fe3O4/MgO(001) interface. Using soft x-ray absorption spectroscopy, we have discovered that the so-called A-sites are completely missing in the first Fe3O4 monolayer. This discovery allows us to develop an unexpected but elegant growth principle in which, during deposition, the Fe atoms are constantly on the move to solve the divergent electrostatic potential problem, thereby ensuring epitaxy and stoichiometry at the same time. This growth principle provides a new perspective for the design of interfaces.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Chang, C. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hu, Z.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klein, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, X. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sutarto, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tanaka, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cezar, J. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brookes, N. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lin, H. -J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hsieh, H. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chen, C. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rata, A. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tjeng, L. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-258304
DOI: 10.1103/PhysRevX.6.041011
Journal or Publication Title: Phys. Rev. X
Volume: 6
Number: 4
Date: 2016
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2160-3308
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
STABILIZATION; PHOTOEMISSION; TRANSITION; BEHAVIOR; INTERFACES; SURFACE; GROWTHMultiple languages
Physics, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/25830

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