Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface

Yunzhong Chen; Felix Trier; Takeshi Kasama; Dennis V. Christensen; Nicolas Emile Bovet; Zoltan I. Balogh; Han Li; Karl Tor Sune Thydén; Wei Zhang; Sadegh Yazdi; Poul Norby; Nini Pryds; Søren Linderoth

doi:10.1021/nl504622w

Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface

Yunzhong Chen^*, Felix Trier, Takeshi Kasama, Dennis V. Christensen, Nicolas Emile Bovet, Zoltan I. Balogh, Han Li, Karl Tor Sune Thydén, Wei Zhang, Sadegh Yazdi, Poul Norby, Nini Pryds, Søren Linderoth

^*Corresponding author for this work

Department of Chemistry

70 Citations (Scopus)

Abstract

The discovery of two-dimensional electron gases (2DEGs) in SrTiO₃-based heterostructures provides new opportunities for nanoelectronics. Herein, we create a new type of oxide 2DEG by the epitaxial-strain-induced polarization at an otherwise nonpolar perovskite-type interface of CaZrO₃/SrTiO₃. Remarkably, this heterointerface is atomically sharp and exhibits a high electron mobility exceeding 60 000 cm² V^-1 s^-1 at low temperatures. The 2DEG carrier density exhibits a critical dependence on the film thickness, in good agreement with the polarization induced 2DEG scheme.

Original language	English
Journal	Nano Letters
Volume	15
Issue number	3
Pages (from-to)	1849-1854
Number of pages	6
ISSN	1530-6984
DOIs	https://doi.org/10.1021/nl504622w
Publication status	Published - 2015

Keywords

Complex oxide interfaces
oxide electronics
strain induced polarization
two-dimensional electron gases

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10.1021/nl504622w

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Chen, Y., Trier, F., Kasama, T., Christensen, D. V., Bovet, N. E., Balogh, Z. I., Li, H., Thydén, K. T. S., Zhang, W., Yazdi, S., Norby, P., Pryds, N., & Linderoth, S. (2015). Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface. Nano Letters, 15(3), 1849-1854. https://doi.org/10.1021/nl504622w

Chen, Y, Trier, F, Kasama, T, Christensen, DV, Bovet, NE, Balogh, ZI, Li, H, Thydén, KTS, Zhang, W, Yazdi, S, Norby, P, Pryds, N & Linderoth, S 2015, 'Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface', Nano Letters, vol. 15, no. 3, pp. 1849-1854. https://doi.org/10.1021/nl504622w

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title = "Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface",

abstract = "The discovery of two-dimensional electron gases (2DEGs) in SrTiO3-based heterostructures provides new opportunities for nanoelectronics. Herein, we create a new type of oxide 2DEG by the epitaxial-strain-induced polarization at an otherwise nonpolar perovskite-type interface of CaZrO3/SrTiO3. Remarkably, this heterointerface is atomically sharp and exhibits a high electron mobility exceeding 60 000 cm2 V-1 s-1 at low temperatures. The 2DEG carrier density exhibits a critical dependence on the film thickness, in good agreement with the polarization induced 2DEG scheme.",

keywords = "Complex oxide interfaces, oxide electronics, strain induced polarization, two-dimensional electron gases",

author = "Yunzhong Chen and Felix Trier and Takeshi Kasama and Christensen, {Dennis V.} and Bovet, {Nicolas Emile} and Balogh, {Zoltan I.} and Han Li and Thyd{\'e}n, {Karl Tor Sune} and Wei Zhang and Sadegh Yazdi and Poul Norby and Nini Pryds and S{\o}ren Linderoth",

year = "2015",

doi = "10.1021/nl504622w",

language = "English",

volume = "15",

pages = "1849--1854",

journal = "Nano Letters",

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T1 - Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface

AU - Chen, Yunzhong

AU - Trier, Felix

AU - Kasama, Takeshi

AU - Christensen, Dennis V.

AU - Bovet, Nicolas Emile

AU - Balogh, Zoltan I.

AU - Li, Han

AU - Thydén, Karl Tor Sune

AU - Zhang, Wei

AU - Yazdi, Sadegh

AU - Norby, Poul

AU - Pryds, Nini

AU - Linderoth, Søren

PY - 2015

Y1 - 2015

N2 - The discovery of two-dimensional electron gases (2DEGs) in SrTiO3-based heterostructures provides new opportunities for nanoelectronics. Herein, we create a new type of oxide 2DEG by the epitaxial-strain-induced polarization at an otherwise nonpolar perovskite-type interface of CaZrO3/SrTiO3. Remarkably, this heterointerface is atomically sharp and exhibits a high electron mobility exceeding 60 000 cm2 V-1 s-1 at low temperatures. The 2DEG carrier density exhibits a critical dependence on the film thickness, in good agreement with the polarization induced 2DEG scheme.

AB - The discovery of two-dimensional electron gases (2DEGs) in SrTiO3-based heterostructures provides new opportunities for nanoelectronics. Herein, we create a new type of oxide 2DEG by the epitaxial-strain-induced polarization at an otherwise nonpolar perovskite-type interface of CaZrO3/SrTiO3. Remarkably, this heterointerface is atomically sharp and exhibits a high electron mobility exceeding 60 000 cm2 V-1 s-1 at low temperatures. The 2DEG carrier density exhibits a critical dependence on the film thickness, in good agreement with the polarization induced 2DEG scheme.

KW - Complex oxide interfaces

KW - oxide electronics

KW - strain induced polarization

KW - two-dimensional electron gases

U2 - 10.1021/nl504622w

DO - 10.1021/nl504622w

M3 - Journal article

C2 - 25692804

AN - SCOPUS:84924584827

SN - 1530-6984

VL - 15

SP - 1849

EP - 1854

JO - Nano Letters

JF - Nano Letters

IS - 3

ER -

Creation of high mobility two-dimensional electron gases via strain induced polarization at an otherwise nonpolar complex oxide interface

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Keywords

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