TU Darmstadt / ULB / TUprints

Reversible metal-insulator transition of Ar-irradiated LaAlO₃/SrTiO₃ interfaces

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, 2015, 92 (15)
doi: 10.26083/tuprints-00021178
Article, Secondary publication, Publisher's Version

[img] Text
Copyright Information: In Copyright.

Download (2MB)
Item Type: Article
Type of entry: Secondary publication
Title: Reversible metal-insulator transition of Ar-irradiated LaAlO₃/SrTiO₃ interfaces
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2015
Publisher: American Physical Society
Journal or Publication Title: Physical Review B
Volume of the journal: 92
Issue Number: 15
Collation: 9 Seiten
DOI: 10.26083/tuprints-00021178
Corresponding Links:
Origin: Secondary publication service

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: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-211784
Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
Date Deposited: 22 Apr 2022 11:04
Last Modified: 09 Feb 2023 10:33
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21178
PPN: 504454447
Actions (login required)
View Item View Item