Anisotropic magnetoresistance in a 2DEG in a quasi-random magnetic field

A. W. Rushforth; B. L. Gallagher; P. C. Main; A. C. Neumann; M. Henini; C. H. Marrows; B. J. Hickey

doi:10.1103/PhysRevB.70.193313

Anisotropic magnetoresistance in a 2DEG in a quasi-random magnetic field

Mesoscale and Nanoscale Physics 2009-11-10 v1

Authors: A. W. Rushforth , B. L. Gallagher , P. C. Main , A. C. Neumann , M. Henini , C. H. Marrows , B. J. Hickey

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We present magnetotransport results for a 2D electron gas (2DEG) subject to the quasi-random magnetic field produced by randomly positioned sub-micron Co dots deposited onto the surface of a GaAs/AlGaAs heterostructure. We observe strong local and non-local anisotropic magnetoresistance for external magnetic fields in the plane of the 2DEG. Monte-Carlo calculations confirm that this is due to the changing topology of the quasi-random magnetic field in which electrons are guided predominantly along contours of zero magnetic field.

Keywords

anisotropic magnetoresistance 2D electron gas quasi-random magnetic field Co dots Monte Carlo simulation

Cite

@article{arxiv.cond-mat/0308452,
  title  = {Anisotropic magnetoresistance in a 2DEG in a quasi-random magnetic field},
  author = {A. W. Rushforth and B. L. Gallagher and P. C. Main and A. C. Neumann and M. Henini and C. H. Marrows and B. J. Hickey},
  journal= {arXiv preprint arXiv:cond-mat/0308452},
  year   = {2009}
}

Comments

4 pages, 6 figures, submitted to Phys. Rev. B

Anisotropic magnetoresistance in a 2DEG in a quasi-random magnetic field

Abstract

Keywords

Cite

Comments

Related papers