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| 001 | 903136 | ||
| 005 | 20220103172053.0 | ||
| 024 | 7 | _ | |a 10.1063/5.0049334 |2 doi |
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| 100 | 1 | _ | |a Hensling, Felix V. E. |0 P:(DE-Juel1)165926 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Epitaxial stannate pyrochlore thin films: Limitations of cation stoichiometry and electron doping |
| 260 | _ | _ | |a Melville, NY |c 2021 |b AIP Publ. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a We have studied the growth of epitaxial films of stannate pyrochlores with a general formula A 2 Sn 2 O 7 (A = La and Y) and find that itis possible to incorporate ∼ 25% excess of the A-site constituent; in contrast, any tin excess is expelled. We unravel the defect chemistry,allowing for the incorporation of excess A-site species and the mechanism behind the tin expulsion. An A-site surplus is manifested by ashift in the film diffraction peaks, and the expulsion of tin is apparent from the surface morphology of the film. In an attempt to increaseLa 2 Sn 2 O 7 conductivity through n-type doping, substantial quantities of tin have been substituted by antimony while maintaining good filmquality. The sample remained insulating as explained by first-principles computations, showing that both the oxygen vacancy and antimony-on-tin substitutional defects are deep. Similar conclusions are drawn on Y 2 Sn 2 O 7 . An alternative n-type dopant, fluorine on oxygen, is shallowaccording to computations and more likely to lead to electrical conductivity. The bandgaps of stoichiometric La 2 Sn 2 O 7 and Y 2 Sn 2 O 7 filmswere determined by spectroscopic ellipsometry to be 4.2 eV and 4.48 eV, respectively. |
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| 700 | 1 | _ | |a Singleton, Patrick |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Sun, Jiaxin |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Schubert, Jürgen |0 P:(DE-Juel1)128631 |b 5 |
| 700 | 1 | _ | |a Paik, Hanjong |0 0000-0002-8363-4679 |b 6 |
| 700 | 1 | _ | |a Subedi, Indra |0 0000-0003-2300-6010 |b 7 |
| 700 | 1 | _ | |a Subedi, Biwas |0 0000-0002-7690-0406 |b 8 |
| 700 | 1 | _ | |a Rignanese, Gian-Marco |0 0000-0002-1422-1205 |b 9 |
| 700 | 1 | _ | |a Podraza, Nikolas J. |0 P:(DE-HGF)0 |b 10 |
| 700 | 1 | _ | |a Hautier, Geoffroy |0 0000-0003-1754-2220 |b 11 |
| 700 | 1 | _ | |a Schlom, Darrell G. |0 0000-0003-2493-6113 |b 12 |
| 773 | _ | _ | |a 10.1063/5.0049334 |g Vol. 9, no. 5, p. 051113 - |0 PERI:(DE-600)2722985-3 |n 5 |p 051113 - |t APL materials |v 9 |y 2021 |x 2166-532X |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/903136/files/Felix%20Hensling%20Stannate.pdf |y OpenAccess |
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