Aurino, P. P. ; Kalabukhov, A. ; Tuzla, N. ; Olsson, E. ; Klein, Andreas ; Erhart, P. ; Boikov, Y. A. ; Serenkov, I. T. ; Sakharov, V. I. ; Claeson, T. ; Winkler, D. (2022)
Reversible metal-insulator transition of Ar-irradiated LaAlO₃/SrTiO₃ interfaces.
In: Physical Review B, 92 (15)
doi: 10.26083/tuprints-00021178
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
The conducting state of a quasi-two-dimensional electron gas (q2DEG), formed at the heterointerface between the two wide-bandgap insulators LaAlO₃ (LAO) and SrTiO₃, can be made completely insulating by low-energy, 150-eV, Ar⁺ irradiation. The metallic behavior of the interface can be recovered by high-temperature oxygen annealing. The electrical transport properties of the recovered q2DEG are exactly the same as before the irradiation. Microstructural investigations confirm that the transition is not due to physical etching or crystal lattice distortion of the LAO film below its critical thickness. They also reveal a correlation between electrical state, LAO film surface amorphization, and argon ion implantation. The experimental results are in agreement with density functional theory calculations of Ar implantation and migration in the LAO film. This suggests that the metal-insulator transition may be caused by charge trapping in the defect amorphous layer created during the ion irradiation.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Aurino, P. P. ; Kalabukhov, A. ; Tuzla, N. ; Olsson, E. ; Klein, Andreas ; Erhart, P. ; Boikov, Y. A. ; Serenkov, I. T. ; Sakharov, V. I. ; Claeson, T. ; Winkler, D. |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Reversible metal-insulator transition of Ar-irradiated LaAlO₃/SrTiO₃ interfaces |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 92 |
| (Heft-)Nummer: | 15 |
| Kollation: | 9 Seiten |
| DOI: | 10.26083/tuprints-00021178 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/21178 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | The conducting state of a quasi-two-dimensional electron gas (q2DEG), formed at the heterointerface between the two wide-bandgap insulators LaAlO₃ (LAO) and SrTiO₃, can be made completely insulating by low-energy, 150-eV, Ar⁺ irradiation. The metallic behavior of the interface can be recovered by high-temperature oxygen annealing. The electrical transport properties of the recovered q2DEG are exactly the same as before the irradiation. Microstructural investigations confirm that the transition is not due to physical etching or crystal lattice distortion of the LAO film below its critical thickness. They also reveal a correlation between electrical state, LAO film surface amorphization, and argon ion implantation. The experimental results are in agreement with density functional theory calculations of Ar implantation and migration in the LAO film. This suggests that the metal-insulator transition may be caused by charge trapping in the defect amorphous layer created during the ion irradiation. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-211784 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 22 Apr 2022 11:04 |
| Letzte Änderung: | 25 Apr 2022 06:24 |
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