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| 001 | 155485 | ||
| 005 | 20230426083112.0 | ||
| 024 | 7 | _ | |2 doi |a 10.1103/PhysRevB.89.241401 |
| 024 | 7 | _ | |2 ISSN |a 0163-1829 |
| 024 | 7 | _ | |2 ISSN |a 1095-3795 |
| 024 | 7 | _ | |2 ISSN |a 1550-235X |
| 024 | 7 | _ | |2 ISSN |a 0556-2805 |
| 024 | 7 | _ | |2 ISSN |a 1098-0121 |
| 024 | 7 | _ | |2 WOS |a WOS:000336917700001 |
| 024 | 7 | _ | |2 Handle |a 2128/9120 |
| 037 | _ | _ | |a FZJ-2014-04651 |
| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |0 P:(DE-HGF)0 |a De Souza, R. A. |b 0 |e Corresponding Author |
| 245 | _ | _ | |a Finite-size versus interface-proximity effects in thin-film epitaxial $SrTiO_3$ |
| 260 | _ | _ | |a College Park, Md. |b APS |c 2014 |
| 336 | 7 | _ | |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |a Journal Article |b journal |m journal |s 1410959032_3809 |
| 336 | 7 | _ | |2 DataCite |a Output Types/Journal article |
| 336 | 7 | _ | |0 0 |2 EndNote |a Journal Article |
| 336 | 7 | _ | |2 BibTeX |a ARTICLE |
| 336 | 7 | _ | |2 ORCID |a JOURNAL_ARTICLE |
| 336 | 7 | _ | |2 DRIVER |a article |
| 520 | _ | _ | |a The equilibrium electrical conductivity of epitaxial SrTiO3 (STO) thin films was investigated as a function of temperature, 950≤ T/K ≤1100, and oxygen partial pressure, 10−23≤ pO2/bar ≤1. Compared with single-crystal STO, nanoscale thin-film STO exhibited with decreasing film thickness an increasingly enhanced electronic conductivity under highly reducing conditions, with a corresponding decrease in the activation enthalpy of conduction. This implies substantial modification of STO's point-defect thermodynamics for nanoscale film thicknesses. We argue, however, against such a finite-size effect and for an interface-proximity effect. Indeed, assuming trapping of oxygen vacancies at the STO surface and concomitant depletion of oxygen vacancies—and accumulation of electrons—in an equilibrium surface space-charge layer, we are able to predict quantitatively the conductivity as a function of temperature, oxygen partial pressure, and film thickness. Particularly complex behavior is predicted for ultrathin films that are consumed entirely by space charge. |
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| 542 | _ | _ | |i 2014-06-04 |2 Crossref |u http://link.aps.org/licenses/aps-default-license |
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| 700 | 1 | _ | |0 P:(DE-Juel1)130620 |a Dittmann, R. |b 3 |u fzj |
| 773 | 1 | 8 | |a 10.1103/physrevb.89.241401 |b American Physical Society (APS) |d 2014-06-04 |n 24 |p 241401 |3 journal-article |2 Crossref |t Physical Review B |v 89 |y 2014 |x 1098-0121 |
| 773 | _ | _ | |a 10.1103/PhysRevB.89.241401 |g Vol. 89, no. 24, p. 241401 |0 PERI:(DE-600)2844160-6 |n 24 |p 241401 |t Physical review / B |v 89 |y 2014 |x 1098-0121 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/155485/files/FZJ-2014-04651.pdf |y OpenAccess |
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| 914 | 1 | _ | |y 2014 |
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