Multiple conducting carriers generated in LaAlO3 / SrTiO 3 heterostructures

S. S.A. Seo; Z. Marton; W. S. Choi; G. W.J. Hassink; D. H.A. Blank; H. Y. Hwang; T. W. Noh; T. Egami; H. N. Lee

doi:10.1063/1.3213390

Multiple conducting carriers generated in LaAlO₃ / SrTiO ₃ heterostructures

S. S.A. Seo, Z. Marton, W. S. Choi, G. W.J. Hassink, D. H.A. Blank, H. Y. Hwang, T. W. Noh, T. Egami, H. N. Lee

Producción científica: Article › revisión exhaustiva

76 Citas (Scopus)

Resumen

We have found that there is more than one type of conducting carriers generated in LaAlO₃ / SrTiO₃ heterostructures by comparing the sheet carrier density and mobility from optical transmission spectroscopy with those from dc-transport measurements. When multiple types of carriers exist, optical characterization dominantly reflects the contribution from the high-density carriers whereas dc-transport measurements may exaggerate the contribution of the high-mobility carriers even though they are present at low density. Since the low-temperature mobility determined by dc-transport in the LaAlO₃ / SrTiO₃ heterostructures is much higher than that extracted by optical method, we attribute the origin of high-mobility transport to the low-density conducting carriers.

Idioma original	English
Número de artículo	082107
Publicación	Applied Physics Letters
Volumen	95
N.º	8
DOI	https://doi.org/10.1063/1.3213390
Estado	Published - 2009

Nota bibliográfica

Funding Information:
We thank I. Ivanov and H. M. Christen for useful discussions. This work was sponsored by the Division of Materials Sciences and Engineering, U. S. Department of Energy, a nanotechnology program of the Dutch Ministry of Economic Affairs (NanoNed), and National Science Foundation by Grant No. DMR04-04781.

Financiación

We thank I. Ivanov and H. M. Christen for useful discussions. This work was sponsored by the Division of Materials Sciences and Engineering, U. S. Department of Energy, a nanotechnology program of the Dutch Ministry of Economic Affairs (NanoNed), and National Science Foundation by Grant No. DMR04-04781.

Financiadores	Número del financiador
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	DMR04-04781
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China
U.S. Department of Energy Oak Ridge National Laboratory U.S. Department of Energy National Science Foundation National Energy Research Scientific Computing Center
Division of Materials Sciences and Engineering
Ministerie van Economische Zaken

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Multiple conducting carriers generated in LaAlO3 / SrTiO 3 heterostructures",

abstract = "We have found that there is more than one type of conducting carriers generated in LaAlO3 / SrTiO3 heterostructures by comparing the sheet carrier density and mobility from optical transmission spectroscopy with those from dc-transport measurements. When multiple types of carriers exist, optical characterization dominantly reflects the contribution from the high-density carriers whereas dc-transport measurements may exaggerate the contribution of the high-mobility carriers even though they are present at low density. Since the low-temperature mobility determined by dc-transport in the LaAlO3 / SrTiO3 heterostructures is much higher than that extracted by optical method, we attribute the origin of high-mobility transport to the low-density conducting carriers.",

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note = "Funding Information: We thank I. Ivanov and H. M. Christen for useful discussions. This work was sponsored by the Division of Materials Sciences and Engineering, U. S. Department of Energy, a nanotechnology program of the Dutch Ministry of Economic Affairs (NanoNed), and National Science Foundation by Grant No. DMR04-04781.",

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AU - Seo, S. S.A.

AU - Marton, Z.

AU - Choi, W. S.

AU - Hassink, G. W.J.

AU - Blank, D. H.A.

AU - Hwang, H. Y.

AU - Noh, T. W.

AU - Egami, T.

AU - Lee, H. N.

N1 - Funding Information: We thank I. Ivanov and H. M. Christen for useful discussions. This work was sponsored by the Division of Materials Sciences and Engineering, U. S. Department of Energy, a nanotechnology program of the Dutch Ministry of Economic Affairs (NanoNed), and National Science Foundation by Grant No. DMR04-04781.

PY - 2009

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