Thermally excited multiband conduction in LaAlO3/SrTiO3 heterostructures exhibiting scattering

V.K. Guduru, A. McCollam, A. Jost, Sander Wenderich, H. Hilgenkamp, J.C. Maan, Alexander Brinkman, U. Zeitler

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Magnetotransport measurements of charge carriers at the interface of a LaAlO 3 /SrTiO 3 heterostructure with 26 unit cells of LaAlO 3 show Hall resistance and magnetoresistance which at low and high temperatures is described by a single channel of electronlike charge carriers. At intermediate temperatures, we observe nonlinear Hall resistance and positive magnetoresistance, establishing the presence of at least two electronlike channels with significantly different mobilities and carrier concentrations. These channels are separated by 6 meV in energy and their temperature-dependent occupation and mobilities are responsible for the observed transport properties of the interface. We observe that one of the channels has a mobility that decreases with decreasing temperature, consistent with magnetic scattering in this channel.
Original languageUndefined
Article number241301
Pages (from-to)241301-1-241301-5
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume88
Issue number241301
DOIs
Publication statusPublished - 2013

Keywords

  • METIS-302118
  • IR-89211

Cite this

Guduru, V.K. ; McCollam, A. ; Jost, A. ; Wenderich, Sander ; Hilgenkamp, H. ; Maan, J.C. ; Brinkman, Alexander ; Zeitler, U. / Thermally excited multiband conduction in LaAlO3/SrTiO3 heterostructures exhibiting scattering. In: Physical Review B (Condensed Matter and Materials Physics). 2013 ; Vol. 88, No. 241301. pp. 241301-1-241301-5.
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Thermally excited multiband conduction in LaAlO3/SrTiO3 heterostructures exhibiting scattering. / Guduru, V.K.; McCollam, A.; Jost, A.; Wenderich, Sander; Hilgenkamp, H.; Maan, J.C.; Brinkman, Alexander; Zeitler, U.

In: Physical Review B (Condensed Matter and Materials Physics), Vol. 88, No. 241301, 241301, 2013, p. 241301-1-241301-5.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Thermally excited multiband conduction in LaAlO3/SrTiO3 heterostructures exhibiting scattering

AU - Guduru, V.K.

AU - McCollam, A.

AU - Jost, A.

AU - Wenderich, Sander

AU - Hilgenkamp, H.

AU - Maan, J.C.

AU - Brinkman, Alexander

AU - Zeitler, U.

PY - 2013

Y1 - 2013

N2 - Magnetotransport measurements of charge carriers at the interface of a LaAlO 3 /SrTiO 3 heterostructure with 26 unit cells of LaAlO 3 show Hall resistance and magnetoresistance which at low and high temperatures is described by a single channel of electronlike charge carriers. At intermediate temperatures, we observe nonlinear Hall resistance and positive magnetoresistance, establishing the presence of at least two electronlike channels with significantly different mobilities and carrier concentrations. These channels are separated by 6 meV in energy and their temperature-dependent occupation and mobilities are responsible for the observed transport properties of the interface. We observe that one of the channels has a mobility that decreases with decreasing temperature, consistent with magnetic scattering in this channel.

AB - Magnetotransport measurements of charge carriers at the interface of a LaAlO 3 /SrTiO 3 heterostructure with 26 unit cells of LaAlO 3 show Hall resistance and magnetoresistance which at low and high temperatures is described by a single channel of electronlike charge carriers. At intermediate temperatures, we observe nonlinear Hall resistance and positive magnetoresistance, establishing the presence of at least two electronlike channels with significantly different mobilities and carrier concentrations. These channels are separated by 6 meV in energy and their temperature-dependent occupation and mobilities are responsible for the observed transport properties of the interface. We observe that one of the channels has a mobility that decreases with decreasing temperature, consistent with magnetic scattering in this channel.

KW - METIS-302118

KW - IR-89211

U2 - 10.1103/PhysRevB.88.241301

DO - 10.1103/PhysRevB.88.241301

M3 - Article

VL - 88

SP - 241301-1-241301-5

JO - Physical review B: Covering condensed matter and materials physics

JF - Physical review B: Covering condensed matter and materials physics

SN - 2469-9950

IS - 241301

M1 - 241301

ER -