Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlations. Jang, H. W., Felker, D. A., Bark, C. W., Wang, Y., Niranjan, M. K., Nelson, C. T., Zhang, Y., Su, D., Folkman, C. M., Baek, S. H., Lee, S., Janicka, K., Zhu, Y., Pan, X. Q., Fong, D. D., Tsymbal, E. Y., Rzchowski, M. S., & Eom, C. B. SCIENCE, 331(6019):886-889, FEB 18, 2011. doi abstract bibtex The formation of two-dimensional electron gases (2DEGs) at complex oxide interfaces is directly influenced by the oxide electronic properties. We investigated how local electron correlations control the 2DEG by inserting a single atomic layer of a rare-earth oxide (RO) [(R is lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), or yttrium (Y)] into an epitaxial strontium titanate oxide (SrTiO3) matrix using pulsed-laser deposition with atomic layer control. We find that structures with La, Pr, and Nd ions result in conducting 2DEGs at the inserted layer, whereas the structures with Sm or Y ions are insulating. Our local spectroscopic and theoretical results indicate that the interfacial conductivity is dependent on electronic correlations that decay spatially into the SrTiO3 matrix. Such correlation effects can lead to new functionalities in designed heterostructures.
@article{ ISI:000287455100049,
Author = {Jang, H. W. and Felker, D. A. and Bark, C. W. and Wang, Y. and Niranjan,
M. K. and Nelson, C. T. and Zhang, Y. and Su, D. and Folkman, C. M. and
Baek, S. H. and Lee, S. and Janicka, K. and Zhu, Y. and Pan, X. Q. and
Fong, D. D. and Tsymbal, E. Y. and Rzchowski, M. S. and Eom, C. B.},
Title = {{Metallic and Insulating Oxide Interfaces Controlled by Electronic
Correlations}},
Journal = {{SCIENCE}},
Year = {{2011}},
Volume = {{331}},
Number = {{6019}},
Pages = {{886-889}},
Month = {{FEB 18}},
Abstract = {{The formation of two-dimensional electron gases (2DEGs) at complex oxide
interfaces is directly influenced by the oxide electronic properties. We
investigated how local electron correlations control the 2DEG by
inserting a single atomic layer of a rare-earth oxide (RO) {[}(R is
lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), or
yttrium (Y)] into an epitaxial strontium titanate oxide (SrTiO3) matrix
using pulsed-laser deposition with atomic layer control. We find that
structures with La, Pr, and Nd ions result in conducting 2DEGs at the
inserted layer, whereas the structures with Sm or Y ions are insulating.
Our local spectroscopic and theoretical results indicate that the
interfacial conductivity is dependent on electronic correlations that
decay spatially into the SrTiO3 matrix. Such correlation effects can
lead to new functionalities in designed heterostructures.}},
DOI = {{10.1126/science.1198781}},
ISSN = {{0036-8075}},
EISSN = {{1095-9203}},
ResearcherID-Numbers = {{Wang, Yong/F-7019-2010
Su, Dong/A-8233-2013
Zhang, Yi/H-4678-2017
Baek, Seung-Hyub/B-9189-2013
Tsymbal, Evgeny/G-3493-2013
Jang, Ho Won/D-9866-2011
Eom, Chang-Beom/I-5567-2014
Bark, Chung Wung/B-9534-2014
Lee, Sanghan/C-8876-2012}},
ORCID-Numbers = {{Wang, Yong/0000-0002-0248-9757
Su, Dong/0000-0002-1921-6683
Tsymbal, Evgeny/0000-0002-6728-5480
Jang, Ho Won/0000-0002-6952-7359
Bark, Chung Wung/0000-0002-9394-4240
Lee, Sanghan/0000-0002-5807-864X}},
Unique-ID = {{ISI:000287455100049}},
}
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B."],"year":2011,"bibtype":"article","biburl":"http://oxide.engr.wisc.edu/newWebsite/papers/oxide.bib","bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Jang"],"firstnames":["H.","W."],"suffixes":[]},{"propositions":[],"lastnames":["Felker"],"firstnames":["D.","A."],"suffixes":[]},{"propositions":[],"lastnames":["Bark"],"firstnames":["C.","W."],"suffixes":[]},{"propositions":[],"lastnames":["Wang"],"firstnames":["Y."],"suffixes":[]},{"propositions":[],"lastnames":["Niranjan"],"firstnames":["M.","K."],"suffixes":[]},{"propositions":[],"lastnames":["Nelson"],"firstnames":["C.","T."],"suffixes":[]},{"propositions":[],"lastnames":["Zhang"],"firstnames":["Y."],"suffixes":[]},{"propositions":[],"lastnames":["Su"],"firstnames":["D."],"suffixes":[]},{"propositions":[],"lastnames":["Folkman"],"firstnames":["C.","M."],"suffixes":[]},{"propositions":[],"lastnames":["Baek"],"firstnames":["S.","H."],"suffixes":[]},{"propositions":[],"lastnames":["Lee"],"firstnames":["S."],"suffixes":[]},{"propositions":[],"lastnames":["Janicka"],"firstnames":["K."],"suffixes":[]},{"propositions":[],"lastnames":["Zhu"],"firstnames":["Y."],"suffixes":[]},{"propositions":[],"lastnames":["Pan"],"firstnames":["X.","Q."],"suffixes":[]},{"propositions":[],"lastnames":["Fong"],"firstnames":["D.","D."],"suffixes":[]},{"propositions":[],"lastnames":["Tsymbal"],"firstnames":["E.","Y."],"suffixes":[]},{"propositions":[],"lastnames":["Rzchowski"],"firstnames":["M.","S."],"suffixes":[]},{"propositions":[],"lastnames":["Eom"],"firstnames":["C.","B."],"suffixes":[]}],"title":"Metallic and Insulating Oxide Interfaces Controlled by Electronic Correlations","journal":"SCIENCE","year":"2011","volume":"331","number":"6019","pages":"886-889","month":"FEB 18","abstract":"The formation of two-dimensional electron gases (2DEGs) at complex oxide interfaces is directly influenced by the oxide electronic properties. We investigated how local electron correlations control the 2DEG by inserting a single atomic layer of a rare-earth oxide (RO) [(R is lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), or yttrium (Y)] into an epitaxial strontium titanate oxide (SrTiO3) matrix using pulsed-laser deposition with atomic layer control. We find that structures with La, Pr, and Nd ions result in conducting 2DEGs at the inserted layer, whereas the structures with Sm or Y ions are insulating. Our local spectroscopic and theoretical results indicate that the interfacial conductivity is dependent on electronic correlations that decay spatially into the SrTiO3 matrix. 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S. and Eom, C. B.},\nTitle = {{Metallic and Insulating Oxide Interfaces Controlled by Electronic\n Correlations}},\nJournal = {{SCIENCE}},\nYear = {{2011}},\nVolume = {{331}},\nNumber = {{6019}},\nPages = {{886-889}},\nMonth = {{FEB 18}},\nAbstract = {{The formation of two-dimensional electron gases (2DEGs) at complex oxide\n interfaces is directly influenced by the oxide electronic properties. We\n investigated how local electron correlations control the 2DEG by\n inserting a single atomic layer of a rare-earth oxide (RO) {[}(R is\n lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), or\n yttrium (Y)] into an epitaxial strontium titanate oxide (SrTiO3) matrix\n using pulsed-laser deposition with atomic layer control. We find that\n structures with La, Pr, and Nd ions result in conducting 2DEGs at the\n inserted layer, whereas the structures with Sm or Y ions are insulating.\n Our local spectroscopic and theoretical results indicate that the\n interfacial conductivity is dependent on electronic correlations that\n decay spatially into the SrTiO3 matrix. 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