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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM

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Direct imaging of the electron liquid at oxide interfaces

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dc.contributor.authorSong, Kyungnull
dc.contributor.authorRyu, Sangwoonull
dc.contributor.authorLee, Hyungwoonull
dc.contributor.authorPaudel, Tula R.null
dc.contributor.authorKoch, Christoph T.null
dc.contributor.authorPark, Bumsunull
dc.contributor.authorLee, Ja Kyungnull
dc.contributor.authorChoi, Si-Youngnull
dc.contributor.authorKim, Young-Minnull
dc.contributor.authorKim, Jong Channull
dc.contributor.authorJeong, Hu Youngnull
dc.contributor.authorRzchowski, Mark S.null
dc.contributor.authorTsymbal, Evgeny Y.null
dc.contributor.authorEom, Chang-Beomnull
dc.contributor.authorOh, Sang Honull
dc.date.accessioned2018-04-12T09:21:40Z-
dc.date.available2018-04-12T09:21:40Z-
dc.date.created2018-04-06null
dc.date.issued201803null
dc.identifier.citationNATURE NANOTECHNOLOGY, v.13, no.3, pp.198 - 203null
dc.identifier.issn1748-3387null
dc.identifier.urihttps://www.nature.com/articles/s41565-017-0040-8null
dc.identifier.urihttp://scholarworks.unist.ac.kr/handle/201301/23920-
dc.description.abstractThe breaking of symmetry across an oxide heterostructure causes the electronic orbitals to be reconstructed at the interface into energy states that are different from their bulk counterparts(1). The detailed nature of the orbital reconstruction critically affects the spatial confinement and the physical properties of the electrons occupying the interfacial orbitals(2-4). Using an example of two-dimensional electron liquids forming at LaAlO3/SrTiO3 interfaces(5,6) with different crystal symmetry, we show that the selective orbital occupation and spatial quantum confinement of electrons can be resolved with subnanometre resolution using inline electron holography. For the standard (001) interface, the charge density map obtained by inline electron holography shows that the two-dimensional electron liquid is confined to the interface with narrow spatial extension (similar to 1.0 +/- 0.3 nm in the half width). On the other hand, the two-dimensional electron liquid formed at the (111) interface shows a much broader spatial extension (similar to 3.3 +/- 0.3 nm) with the maximum density located similar to 2.4 nm away from the interface, in excellent agreement with density functional theory calculations.null
dc.languageENGnull
dc.publisherNATURE PUBLISHING GROUPnull
dc.titleDirect imaging of the electron liquid at oxide interfacesnull
dc.typeARTICLEnull
dc.identifier.pid1056null
dc.identifier.rimsid30105null
dc.identifier.scopusid2-s2.0-85041558929null
dc.identifier.wosid000427009000011null
dc.type.rimsAnull
dc.identifier.doi10.1038/s41565-017-0040-8null
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