Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface at low electron densities

Yanwu Xie; Christopher Bell; Minu Kim; Hisashi Inoue; Yasuyuki Hikita; Harold Y. Hwang

doi:10.1016/j.ssc.2014.08.006

Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface at low electron densities

Materials Science 2015-06-19 v1

Authors: Yanwu Xie , Christopher Bell , Minu Kim , Hisashi Inoue , Yasuyuki Hikita , Harold Y. Hwang

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Abstract

We examined the magneto-transport behavior of electrons confined at the conducting LaAlO3/SrTiO3 interface in the low sheet carrier density regime. We observed well resolved Shubnikov-de Haas quantum oscillations in the longitudinal resistance, and a plateau-like structure in the Hall conductivity. The Landau indices of the plateaus in the Hall conductivity data show spacing close to 4, in units of the quantum of conductance. These experimental features can be explained by a magnetic breakdown transition, which quantitatively explains the area, structure, and degeneracy of the measured Fermi surface.

Keywords

LaAlO3/SrTiO3 interface quantum transport Shubnikov-de Haas oscillations Hall conductivity magnetic breakdown Fermi surface

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@article{arxiv.1403.4343,
  title  = {Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface at low electron densities},
  author = {Yanwu Xie and Christopher Bell and Minu Kim and Hisashi Inoue and Yasuyuki Hikita and Harold Y. Hwang},
  journal= {arXiv preprint arXiv:1403.4343},
  year   = {2015}
}

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16 pages, 4 figures and 1 table

Quantum longitudinal and Hall transport at the LaAlO3/SrTiO3 interface at low electron densities

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