@article{ ISI:000412645100009,
Author = {Ryu, S. and Zhou, H. and Paudel, T. R. and Irwin, J. and Podkaminer, J.
   P. and Bark, C. W. and Lee, D. and Kim, T. H. and Fong, D. D. and
   Rzchowski, M. S. and Tsymbal, E. Y. and Eom, C. B.},
Title = {{In-situ probing of coupled atomic restructuring and metallicity of oxide
   heterointerfaces induced by polar adsorbates}},
Journal = {{APPLIED PHYSICS LETTERS}},
Year = {{2017}},
Volume = {{111}},
Number = {{14}},
Month = {{OCT 2}},
Abstract = {{Microscopic understanding of the surface-controlled conductivity of the
   two dimensional electron gas at complex oxide interfaces is crucial for
   developing functional interfaces. We observe conductivity and structural
   modification using in-situ synchrotron surface x-ray diffraction as the
   surface of a model LaAlO3/SrTiO3 (001) heterostructure is changed by
   polar adsorbates. We find that polar adsorbate-induced interfacial
   metallicity reduces polar distortions in the LaAlO3 layer.
   First-principles density functional theory calculations show that
   surface dipoles introduced by polar adsorbates lead to additional charge
   transfer and the reduction of polar displacements in the LaAlO3 layer,
   consistent with the experimental observations. Our study supports that
   internal structural deformations controlling functionalities can be
   driven without the application of direct electrical or thermal bias and
   offers a route to tuning interfacial properties. These results also
   highlight the important role of in-situ x-ray scattering with atomic
   resolution in capturing and exploring structural distortions and charge
   density changes caused by external perturbations such as chemical
   adsorption, redox reaction, and generation and/or annihilation of
   surface defects. Published by AIP Publishing.}},
DOI = {{10.1063/1.4991956}},
Article-Number = {{141604}},
ISSN = {{0003-6951}},
EISSN = {{1077-3118}},
ResearcherID-Numbers = {{Tsymbal, Evgeny/G-3493-2013
   }},
ORCID-Numbers = {{Tsymbal, Evgeny/0000-0002-6728-5480
   Irwin, Julian/0000-0002-4845-7558}},
Unique-ID = {{ISI:000412645100009}},
}

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B."],"year":2017,"bibtype":"article","biburl":"http://oxide.engr.wisc.edu/newWebsite/papers/oxide.bib","bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Ryu"],"firstnames":["S."],"suffixes":[]},{"propositions":[],"lastnames":["Zhou"],"firstnames":["H."],"suffixes":[]},{"propositions":[],"lastnames":["Paudel"],"firstnames":["T.","R."],"suffixes":[]},{"propositions":[],"lastnames":["Irwin"],"firstnames":["J."],"suffixes":[]},{"propositions":[],"lastnames":["Podkaminer"],"firstnames":["J.","P."],"suffixes":[]},{"propositions":[],"lastnames":["Bark"],"firstnames":["C.","W."],"suffixes":[]},{"propositions":[],"lastnames":["Lee"],"firstnames":["D."],"suffixes":[]},{"propositions":[],"lastnames":["Kim"],"firstnames":["T.","H."],"suffixes":[]},{"propositions":[],"lastnames":["Fong"],"firstnames":["D.","D."],"suffixes":[]},{"propositions":[],"lastnames":["Rzchowski"],"firstnames":["M.","S."],"suffixes":[]},{"propositions":[],"lastnames":["Tsymbal"],"firstnames":["E.","Y."],"suffixes":[]},{"propositions":[],"lastnames":["Eom"],"firstnames":["C.","B."],"suffixes":[]}],"title":"In-situ probing of coupled atomic restructuring and metallicity of oxide heterointerfaces induced by polar adsorbates","journal":"APPLIED PHYSICS LETTERS","year":"2017","volume":"111","number":"14","month":"OCT 2","abstract":"Microscopic understanding of the surface-controlled conductivity of the two dimensional electron gas at complex oxide interfaces is crucial for developing functional interfaces. We observe conductivity and structural modification using in-situ synchrotron surface x-ray diffraction as the surface of a model LaAlO3/SrTiO3 (001) heterostructure is changed by polar adsorbates. We find that polar adsorbate-induced interfacial metallicity reduces polar distortions in the LaAlO3 layer. First-principles density functional theory calculations show that surface dipoles introduced by polar adsorbates lead to additional charge transfer and the reduction of polar displacements in the LaAlO3 layer, consistent with the experimental observations. Our study supports that internal structural deformations controlling functionalities can be driven without the application of direct electrical or thermal bias and offers a route to tuning interfacial properties. These results also highlight the important role of in-situ x-ray scattering with atomic resolution in capturing and exploring structural distortions and charge density changes caused by external perturbations such as chemical adsorption, redox reaction, and generation and/or annihilation of surface defects. Published by AIP Publishing.","doi":"10.1063/1.4991956","article-number":"141604","issn":"0003-6951","eissn":"1077-3118","researcherid-numbers":"Tsymbal, Evgeny/G-3493-2013 ","orcid-numbers":"Tsymbal, Evgeny/0000-0002-6728-5480 Irwin, Julian/0000-0002-4845-7558","unique-id":"ISI:000412645100009","bibtex":"@article{ ISI:000412645100009,\nAuthor = {Ryu, S. and Zhou, H. and Paudel, T. R. and Irwin, J. and Podkaminer, J.\n P. and Bark, C. W. and Lee, D. and Kim, T. H. and Fong, D. D. and\n Rzchowski, M. S. and Tsymbal, E. Y. and Eom, C. B.},\nTitle = {{In-situ probing of coupled atomic restructuring and metallicity of oxide\n heterointerfaces induced by polar adsorbates}},\nJournal = {{APPLIED PHYSICS LETTERS}},\nYear = {{2017}},\nVolume = {{111}},\nNumber = {{14}},\nMonth = {{OCT 2}},\nAbstract = {{Microscopic understanding of the surface-controlled conductivity of the\n two dimensional electron gas at complex oxide interfaces is crucial for\n developing functional interfaces. We observe conductivity and structural\n modification using in-situ synchrotron surface x-ray diffraction as the\n surface of a model LaAlO3/SrTiO3 (001) heterostructure is changed by\n polar adsorbates. We find that polar adsorbate-induced interfacial\n metallicity reduces polar distortions in the LaAlO3 layer.\n First-principles density functional theory calculations show that\n surface dipoles introduced by polar adsorbates lead to additional charge\n transfer and the reduction of polar displacements in the LaAlO3 layer,\n consistent with the experimental observations. Our study supports that\n internal structural deformations controlling functionalities can be\n driven without the application of direct electrical or thermal bias and\n offers a route to tuning interfacial properties. These results also\n highlight the important role of in-situ x-ray scattering with atomic\n resolution in capturing and exploring structural distortions and charge\n density changes caused by external perturbations such as chemical\n adsorption, redox reaction, and generation and/or annihilation of\n surface defects. 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