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Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 80: Low-Dimensional Systems - Poster Session

TT 80.4: Poster

Wednesday, April 2, 2014, 15:00–19:00, P2

Electronic reconstruction at the isopolar LaTiO3/LaFeO3 interface — •Judith Gabel1, Josée E. Kleibeuker1,2, Zhicheng Zhong3, Hiroaki Nishikawa4, Andreas Müller1, Florian Pfaff1, Dave H.A. Blank2, Michael Sing1, Gertjan Koster2, Karsten Held3, Ralph Claessen1, and Guus Rijnders21Physikalisches Institut and Röntgen Center for Complex Materials Systems (RCCM), Universität Würzburg — 2Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente — 3Institute of Solid State Physics, Vienna University of Technology — 4B.O.S.T., Kinki University

We report the formation of a new non-magnetic Mott insulating phase (U =0.5 eV) at the isopolar interface between two insulating antiferromagnets, LaTiO3 and LaFeO3. The formation is driven by the combination of electrochemical energy, which can be described by O band alignment, and crystal field splitting energy of the t2g and eg bands. As a result of these two driving forces, the Fe 3d bands rearrange and electrons are transferred from Ti to Fe. Using X-ray photoelectron spectroscopy, we find a strong electron transfer of almost 1 e/interface unit cell. The shown route for interfacial electronic reconstruction opens possibilities to design new functional oxide heterointerfaces.

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