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Lombardi Surface Mobility

Application ID: 15579


Surface acoustic phonons and surface roughness have an important effect on the carrier mobility, especially in the thin inversion layer under the gate in MOSFETs. The Lombardi surface mobility model adds surface scattering resulting from these effects to an existing mobility model using Matthiessen’s rule.

This model demonstrates how to use the Lombardi surface mobility model for the electron mobility in a simple MOSFET. The current density profile and total current flowing into the terminal is compared with the constant mobility case.

This application was built using the following:

Semiconductor Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.