Quantum longitudinal and Hall transport at the LaAlO3/SrTiO 3 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/SrTiO ₃ interface at low electron densities

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

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

26 Citations (Scopus)

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 plateau-like structures 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.

Original language	English
Pages (from-to)	25-29
Number of pages	5
Journal	Solid State Communications
Volume	197
DOIs	https://doi.org/10.1016/j.ssc.2014.08.006
Publication status	Published - 2014 Nov
Externally published	Yes

Keywords

A. Quantum oscillations
B. Two-dimensional electron gas
C. Magnetic breakdown
D. Strontium titanate

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/j.ssc.2014.08.006

Cite this

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title = "Quantum longitudinal and Hall transport at the LaAlO3/SrTiO 3 interface at low electron densities",

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 plateau-like structures 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 = "A. Quantum oscillations, B. Two-dimensional electron gas, C. Magnetic breakdown, D. Strontium titanate",

author = "Yanwu Xie and Christopher Bell and Minu Kim and Hisashi Inoue and Yasuyuki Hikita and Hwang, {Harold Y.}",

note = "Funding Information: We are grateful to N. P. Ong, S. Raghu, G. Xu and H. Yao for helpful discussions. This work is supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering , under Contract no. DE-AC02-76SF00515 . ",

year = "2014",

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doi = "10.1016/j.ssc.2014.08.006",

language = "English",

volume = "197",

pages = "25--29",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

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T1 - Quantum longitudinal and Hall transport at the LaAlO3/SrTiO 3 interface at low electron densities

AU - Xie, Yanwu

AU - Bell, Christopher

AU - Kim, Minu

AU - Inoue, Hisashi

AU - Hikita, Yasuyuki

AU - Hwang, Harold Y.

N1 - Funding Information: We are grateful to N. P. Ong, S. Raghu, G. Xu and H. Yao for helpful discussions. This work is supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering , under Contract no. DE-AC02-76SF00515 .

PY - 2014/11

Y1 - 2014/11

N2 - 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 plateau-like structures 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.

AB - 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 plateau-like structures 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.

KW - A. Quantum oscillations

KW - B. Two-dimensional electron gas

KW - C. Magnetic breakdown

KW - D. Strontium titanate

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JF - Solid State Communications

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