Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces

V. Vonk; J. Huijben; D. Kukuruznyak; A. Stierle; H. Hilgenkamp; A. Brinkman; S. Harkema

doi:10.1103/PhysRevB.85.045401

Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces

V. Vonk
, J. Huijben
, D. Kukuruznyak
, A. Stierle
, H. Hilgenkamp
, A. Brinkman
, S. Harkema

Research output: Contribution to journal › Article › Academic › peer-review

51 Citations (Scopus)

125 Downloads (Pure)

Abstract

Our anomalous surface x-ray diffraction study of the interface between SrTiO3(001) substrates and thin polar films of LaAlO3 shows La/Sr interdiffusion leading to neutrally charged Sr1−1.5xLaxO layers. From a thickness of two unit cells, the LaAlO3 film's interior retains its polar stacking sequence, which is compensated by a cationic compositional change of the substrate's terminating TiO2 layer. While such valence-retaining A-site intermixing does not resolve the polar catastrophe, it may be a general feature at oxide interfaces influencing the electronic and magnetic properties

Original language	English
Article number	045401
Pages (from-to)	1-5
Number of pages	5
Journal	Physical Review B (Condensed Matter and Materials Physics)
Volume	85
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.85.045401
Publication status	Published - 2012

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10.1103/PhysRevB.85.045401

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title = "Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces",

abstract = "Our anomalous surface x-ray diffraction study of the interface between SrTiO3(001) substrates and thin polar films of LaAlO3 shows La/Sr interdiffusion leading to neutrally charged Sr1−1.5xLaxO layers. From a thickness of two unit cells, the LaAlO3 film's interior retains its polar stacking sequence, which is compensated by a cationic compositional change of the substrate's terminating TiO2 layer. While such valence-retaining A-site intermixing does not resolve the polar catastrophe, it may be a general feature at oxide interfaces influencing the electronic and magnetic properties",

author = "V. Vonk and J. Huijben and D. Kukuruznyak and A. Stierle and H. Hilgenkamp and A. Brinkman and S. Harkema",

year = "2012",

doi = "10.1103/PhysRevB.85.045401",

language = "English",

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T1 - Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces

AU - Vonk, V.

AU - Huijben, J.

AU - Kukuruznyak, D.

AU - Stierle, A.

AU - Hilgenkamp, H.

AU - Brinkman, A.

AU - Harkema, S.

PY - 2012

Y1 - 2012

N2 - Our anomalous surface x-ray diffraction study of the interface between SrTiO3(001) substrates and thin polar films of LaAlO3 shows La/Sr interdiffusion leading to neutrally charged Sr1−1.5xLaxO layers. From a thickness of two unit cells, the LaAlO3 film's interior retains its polar stacking sequence, which is compensated by a cationic compositional change of the substrate's terminating TiO2 layer. While such valence-retaining A-site intermixing does not resolve the polar catastrophe, it may be a general feature at oxide interfaces influencing the electronic and magnetic properties

AB - Our anomalous surface x-ray diffraction study of the interface between SrTiO3(001) substrates and thin polar films of LaAlO3 shows La/Sr interdiffusion leading to neutrally charged Sr1−1.5xLaxO layers. From a thickness of two unit cells, the LaAlO3 film's interior retains its polar stacking sequence, which is compensated by a cationic compositional change of the substrate's terminating TiO2 layer. While such valence-retaining A-site intermixing does not resolve the polar catastrophe, it may be a general feature at oxide interfaces influencing the electronic and magnetic properties

U2 - 10.1103/PhysRevB.85.045401

DO - 10.1103/PhysRevB.85.045401

M3 - Article

SN - 0163-1829

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JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

IS - 4

M1 - 045401

ER -

Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces

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