Magnetoresistance of a two-dimensional electron gas in random magnetic fields

Luise Theil Hansen; Rafael Jozef Taboryski; Anders Smith; Poul Erik Lindelof; Per Hedegård

doi:10.1016/0039-6028(96)00419-0

Magnetoresistance of a two-dimensional electron gas in random magnetic fields

Luise Theil Hansen, Rafael Jozef Taboryski, Anders Smith, Poul Erik Lindelof, Per Hedegård

Department of Physics

University of Copenhagen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We report measurements on transport in a two-dimensional electron gas (2DEG) subject to an inhomogeneous magnetic field. To achieve the inhomogeneous magnetic field we randomly distributed superconducting lead (Pb) grains on the surface of the samples. In magnetic fields below the critical field for lead, the externally applied magnetic flux is either expelled from or trapped in the lead grains, and thus gives rise to inhomogeneities in the overall flux density penetrating the 2DEG. This inhomogeneous magnetic field causes a characteristic magnetoresistance with either one or two peaks, and a pronounced hysteresis of the peak positions.

Original language	English
Journal	Surface Science
Volume	361-362
Pages (from-to)	349-352
ISSN	0039-6028
DOIs	https://doi.org/10.1016/0039-6028(96)00419-0
Publication status	Published - 1996
Event	Eleventh International Conference on the Electronic Properties of Two Dimensional Systems - Nottingham, UK Duration: 1 Jan 1995 → …

Conference

Conference	Eleventh International Conference on the Electronic Properties of Two Dimensional Systems
City	Nottingham, UK
Period	01/01/1995 → …

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10.1016/0039-6028(96)00419-0

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title = "Magnetoresistance of a two-dimensional electron gas in random magnetic fields",

abstract = "We report measurements on transport in a two-dimensional electron gas (2DEG) subject to an inhomogeneous magnetic field. To achieve the inhomogeneous magnetic field we randomly distributed superconducting lead (Pb) grains on the surface of the samples. In magnetic fields below the critical field for lead, the externally applied magnetic flux is either expelled from or trapped in the lead grains, and thus gives rise to inhomogeneities in the overall flux density penetrating the 2DEG. This inhomogeneous magnetic field causes a characteristic magnetoresistance with either one or two peaks, and a pronounced hysteresis of the peak positions.",

author = "Hansen, {Luise Theil} and Taboryski, {Rafael Jozef} and Anders Smith and Lindelof, {Poul Erik} and Per Hedeg{\aa}rd",

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T1 - Magnetoresistance of a two-dimensional electron gas in random magnetic fields

AU - Hansen, Luise Theil

AU - Taboryski, Rafael Jozef

AU - Smith, Anders

AU - Lindelof, Poul Erik

AU - Hedegård, Per

PY - 1996

Y1 - 1996

N2 - We report measurements on transport in a two-dimensional electron gas (2DEG) subject to an inhomogeneous magnetic field. To achieve the inhomogeneous magnetic field we randomly distributed superconducting lead (Pb) grains on the surface of the samples. In magnetic fields below the critical field for lead, the externally applied magnetic flux is either expelled from or trapped in the lead grains, and thus gives rise to inhomogeneities in the overall flux density penetrating the 2DEG. This inhomogeneous magnetic field causes a characteristic magnetoresistance with either one or two peaks, and a pronounced hysteresis of the peak positions.

AB - We report measurements on transport in a two-dimensional electron gas (2DEG) subject to an inhomogeneous magnetic field. To achieve the inhomogeneous magnetic field we randomly distributed superconducting lead (Pb) grains on the surface of the samples. In magnetic fields below the critical field for lead, the externally applied magnetic flux is either expelled from or trapped in the lead grains, and thus gives rise to inhomogeneities in the overall flux density penetrating the 2DEG. This inhomogeneous magnetic field causes a characteristic magnetoresistance with either one or two peaks, and a pronounced hysteresis of the peak positions.

U2 - 10.1016/0039-6028(96)00419-0

DO - 10.1016/0039-6028(96)00419-0

M3 - Journal article

SN - 0039-6028

VL - 361-362

SP - 349

EP - 352

JO - Surface Science

JF - Surface Science

T2 - Eleventh International Conference on the Electronic Properties of Two Dimensional Systems

Y2 - 1 January 1995

ER -

Magnetoresistance of a two-dimensional electron gas in random magnetic fields

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