Magnetotransport potentials for anisotropic thin films with stripline and ground plane contacts

Yang Tang, Matthew A Grayson*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Superlattice layers in infrared emitters and detectors can be highly anisotropic in their electrical properties, and proper characterization of their in-plane and cross-plane transport can reveal information about the band structure, doping density, impurities, and carrier lifetimes. This work introduces numerical simulation methods for the potential distribution in an anisotropic resistive layer representing a suplerlattice, using both and non-conformal and conformal mapping to simplify the calculation of the potential int he presence of a magnetic field. A shingle strip-line contact is modeled atop the resistive superlattrive layer of interest, which, in turn, contact with a highly conducting back-plane and magnetic field-dependent Neumann boundary conditions at the floating front-plane. To increase cpomputational efficiency, non-conformal an conformal mapping are combined to transform the problem of an intractable infinitely wide anisotropic thin-film smaple to calculable, finite isotropic rectangular shape. The potential calculations introduced here should prove useful for deducing the full conductivity tensor of the superlattice region, including in-plane, cross-plane, and transverse conductivity tensor components.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nanophotonic Devices XII
EditorsManijeh Razeghi, Eric Tournie, Gail J. Brown
PublisherSPIE
Volume9370
ISBN (Electronic)9781628414608
DOIs
StatePublished - Jan 1 2015
EventQuantum Sensing and Nanophotonic Devices XII - San Francisco, United States
Duration: Feb 8 2015Feb 12 2015

Other

OtherQuantum Sensing and Nanophotonic Devices XII
CountryUnited States
CitySan Francisco
Period2/8/152/12/15

Keywords

  • FEM
  • anisotropic conductivity
  • conformal mapping
  • potential distribution
  • thin film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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