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Mobility of 2D material, sigma=N*e*mu with N surface density

  1. Mar 9, 2015 #1
    I have measured the conductivity of a 2D material.
    I want to use σ=N⋅e⋅μ to find the mobility μ=σ/(N⋅e).

    I have measured N using a spectroscopic/imaging technique to get a Surface Density with units [cm^-2].
    Mobility is normally [cm^2/(V⋅s)] but with my N units I get [cm/(V⋅s)].
    Does anyone have a good reference for calculating mobility in 2D materials? Do 2D materials have mobility in different units than bulk/3D materials?

    Thanks for your time.
  2. jcsd
  3. Mar 11, 2015 #2


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    Staff: Mentor

    Surface conductivity has different units, did you take that into account?
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