Heterointerfaces: atomic structures, electronic states, and related properties

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  • WANG Zhongchang
    World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University
  • SAITO Mitsuhiro
    World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University
  • TSUKIMOTO Susumu
    World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University
  • IKUHARA Yuichi
    Institute of Engineering Innovation, The University of Tokyo Nanostructures Research Laboratory, Japan Fine Ceramics Center

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Recent breakthroughs in transmission electron microscopy enable a direct quantitative determination of the technologically significant heterointerfaces, yet a direct interpretation is not always possible. Here, we review the general processes to introduce the high-precision first-principles calculations into the microscopy in order to obtain an atomistic understanding of effects of buried interfaces on a wide range of properties. We demonstrate the possibility and important advance of this combined method in relating interface structures to device physics even for the complex heterointerfaces, SiC/Ti3SiC2, LaxSr1−xO/(SrTiO3)n, and Pd/ZnO presented here. We therefore believe that this approach should be widely applicable to many other interfaces and a range of materials, providing new insights into many long-standing unresolved issues regarding interfaces.

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