Magnetotransport effects in polar versus non-polar SrTiO 3 based heterostructures

E. Flekser; M. Ben Shalom; M. Kim; C. Bell; Y. Hikita; H. Y. Hwang; Y. Dagan

doi:10.1103/PhysRevB.86.121104

Magnetotransport effects in polar versus non-polar SrTiO ₃ based heterostructures

E. Flekser, M. Ben Shalom, M. Kim, C. Bell, Y. Hikita, H. Y. Hwang, Y. Dagan

School of Physics and Astronomy

Tel Aviv University

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

Abstract

Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO ₃/SrTiO ₃ interface and the symmetric Nb-doped SrTiO ₃ heterostructure. Both effects are exceptionally strong in LaAlO ₃/SrTiO ₃. We analyze their temperature, magnetic field, and gate voltage dependencies and find them to arise from a Rashba-type spin-orbit coupling with magnetic scatterers that have two contributions to their potential: spin exchange and Coulomb interaction. Atomic spin-orbit coupling is sufficient to explain the small effects observed in Nb-doped SrTiO ₃. These results clarify contradicting transport interpretations in SrTiO ₃ based heterostructures.

Original language	English
Article number	121104
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.86.121104
State	Published - 11 Sep 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.86.121104

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title = "Magnetotransport effects in polar versus non-polar SrTiO 3 based heterostructures",

abstract = "Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO 3/SrTiO 3 interface and the symmetric Nb-doped SrTiO 3 heterostructure. Both effects are exceptionally strong in LaAlO 3/SrTiO 3. We analyze their temperature, magnetic field, and gate voltage dependencies and find them to arise from a Rashba-type spin-orbit coupling with magnetic scatterers that have two contributions to their potential: spin exchange and Coulomb interaction. Atomic spin-orbit coupling is sufficient to explain the small effects observed in Nb-doped SrTiO 3. These results clarify contradicting transport interpretations in SrTiO 3 based heterostructures.",

author = "E. Flekser and \{Ben Shalom\}, M. and M. Kim and C. Bell and Y. Hikita and Hwang, \{H. Y.\} and Y. Dagan",

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doi = "10.1103/PhysRevB.86.121104",

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T1 - Magnetotransport effects in polar versus non-polar SrTiO 3 based heterostructures

AU - Flekser, E.

AU - Ben Shalom, M.

AU - Kim, M.

AU - Bell, C.

AU - Hikita, Y.

AU - Hwang, H. Y.

AU - Dagan, Y.

PY - 2012/9/11

Y1 - 2012/9/11

N2 - Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO 3/SrTiO 3 interface and the symmetric Nb-doped SrTiO 3 heterostructure. Both effects are exceptionally strong in LaAlO 3/SrTiO 3. We analyze their temperature, magnetic field, and gate voltage dependencies and find them to arise from a Rashba-type spin-orbit coupling with magnetic scatterers that have two contributions to their potential: spin exchange and Coulomb interaction. Atomic spin-orbit coupling is sufficient to explain the small effects observed in Nb-doped SrTiO 3. These results clarify contradicting transport interpretations in SrTiO 3 based heterostructures.

AB - Anisotropic magnetoresistance and negative magnetoresistance for in-plane fields are compared for the LaAlO 3/SrTiO 3 interface and the symmetric Nb-doped SrTiO 3 heterostructure. Both effects are exceptionally strong in LaAlO 3/SrTiO 3. We analyze their temperature, magnetic field, and gate voltage dependencies and find them to arise from a Rashba-type spin-orbit coupling with magnetic scatterers that have two contributions to their potential: spin exchange and Coulomb interaction. Atomic spin-orbit coupling is sufficient to explain the small effects observed in Nb-doped SrTiO 3. These results clarify contradicting transport interpretations in SrTiO 3 based heterostructures.

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DO - 10.1103/PhysRevB.86.121104

M3 - مقالة

SN - 1098-0121

VL - 86

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 12

M1 - 121104

ER -

Magnetotransport effects in polar versus non-polar SrTiO ₃ based heterostructures

Abstract

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