Tailoring LaAlO3/SrTiO3 Interface Metallicity by Oxygen Surface Adsorbates

We report an oxygen surface adsorbates induced metal–insulator transition at the LaAlO3/SrTiO3 interfaces. The observed effects were attributed to the terminations of surface Al sites and the resultant electron-accepting surface states. By controlling the local oxygen adsorptions, we successfully de...

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Published inNano letters Vol. 16; no. 4; pp. 2739 - 2743
Main Authors Dai, Weitao, Adhikari, Sanjay, Garcia-Castro, Andrés Camilo, Romero, Aldo H, Lee, Hyungwoo, Lee, Jung-Woo, Ryu, Sangwoo, Eom, Chang-Beom, Cen, Cheng
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 13.04.2016
Subjects
2DEG
adsorbates
charge transfer doping
oxide interfaces
surface states
surface states
2DEG
adsorbates
oxide interfaces
charge transfer doping
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Abstract We report an oxygen surface adsorbates induced metal–insulator transition at the LaAlO3/SrTiO3 interfaces. The observed effects were attributed to the terminations of surface Al sites and the resultant electron-accepting surface states. By controlling the local oxygen adsorptions, we successfully demonstrated the nondestructive patterning of the interface two-dimensional electron gas (2DEG). The obtained 2DEG structures are stable in air and also robust against general solvent treatments. This study provides new insights into the metal–insulator transition mechanism at the complex oxide interfaces and also a highly efficient technique for tailoring the interface properties.
AbstractList We report an oxygen surface adsorbates induced metal-insulator transition at the LaAlO3/SrTiO3 interfaces. The observed effects were attributed to the terminations of surface Al sites and the resultant electron-accepting surface states. By controlling the local oxygen adsorptions, we successfully demonstrated the nondestructive patterning of the interface two-dimensional electron gas (2DEG). The obtained 2DEG structures are stable in air and also robust against general solvent treatments. This study provides new insights into the metal-insulator transition mechanism at the complex oxide interfaces and also a highly efficient technique for tailoring the interface properties.
Author Dai, Weitao
Garcia-Castro, Andrés Camilo
Lee, Jung-Woo
Eom, Chang-Beom
Lee, Hyungwoo
Adhikari, Sanjay
Romero, Aldo H
Ryu, Sangwoo
Cen, Cheng
AuthorAffiliation University of WisconsinMadison
Centro de Investigación y Estudios Avanzados del IPN
Department of Physics and Astronomy
Université de Liège
Department of Material Science and Engineering
West Virginia University
Physique Théorique des Matériaux
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/26928809$$D View this record in MEDLINE/PubMed
https://www.osti.gov/biblio/1418562$$D View this record in Osti.gov
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2DEG
adsorbates
oxide interfaces
charge transfer doping
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Snippet We report an oxygen surface adsorbates induced metal–insulator transition at the LaAlO3/SrTiO3 interfaces. The observed effects were attributed to the...
We report an oxygen surface adsorbates induced metal-insulator transition at the LaAlO3/SrTiO3 interfaces. The observed effects were attributed to the...
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SubjectTerms 2DEG
adsorbates
charge transfer doping
oxide interfaces
surface states
Title Tailoring LaAlO3/SrTiO3 Interface Metallicity by Oxygen Surface Adsorbates
URI http://dx.doi.org/10.1021/acs.nanolett.6b00421
https://www.ncbi.nlm.nih.gov/pubmed/26928809
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https://www.osti.gov/biblio/1418562
Volume 16
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