Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures

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

Research output: Contribution to journalArticleAcademicpeer-review

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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.
Original languageUndefined
Pages (from-to)082107-
JournalApplied physics letters
Volume95
Issue number8
DOIs
Publication statusPublished - 2009

Keywords

  • METIS-261702
  • IR-72414

Cite this

Seo, S. S. A., Marton, Z., Choi, W. S., Hassink, G. W. J., Blank, D. H. A., Hwang, H. Y., ... Lee, H. N. (2009). Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures. Applied physics letters, 95(8), 082107-. https://doi.org/10.1063/1.3213390
Seo, S.S.A. ; Marton, Z. ; Choi, W.S. ; Hassink, G.W.J. ; Blank, David H.A. ; Hwang, H.Y. ; Noh, T.W. ; Egami, T. ; Lee, H.N. / Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures. In: Applied physics letters. 2009 ; Vol. 95, No. 8. pp. 082107-.
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Seo, SSA, Marton, Z, Choi, WS, Hassink, GWJ, Blank, DHA, Hwang, HY, Noh, TW, Egami, T & Lee, HN 2009, 'Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures' Applied physics letters, vol. 95, no. 8, pp. 082107-. https://doi.org/10.1063/1.3213390

Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures. / Seo, S.S.A.; Marton, Z.; Choi, W.S.; Hassink, G.W.J.; Blank, David H.A.; Hwang, H.Y.; Noh, T.W.; Egami, T.; Lee, H.N.

In: Applied physics letters, Vol. 95, No. 8, 2009, p. 082107-.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Multiple conducting carriers generated in LaAlO3/SrTiO3 heterostructures

AU - Seo, S.S.A.

AU - Marton, Z.

AU - Choi, W.S.

AU - Hassink, G.W.J.

AU - Blank, David H.A.

AU - Hwang, H.Y.

AU - Noh, T.W.

AU - Egami, T.

AU - Lee, H.N.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - METIS-261702

KW - IR-72414

U2 - 10.1063/1.3213390

DO - 10.1063/1.3213390

M3 - Article

VL - 95

SP - 082107-

JO - Applied physics letters

JF - Applied physics letters

SN - 0003-6951

IS - 8

ER -