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Applied Math Seminar
Calculating Transport Properties of Nanodevices
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The Non Equilibrium Green's Function (NEGF) method is a powerful technique to compute quantum transport properties of nanoscale electronic devices. It is applicable to a wide range of devices, from nano transistors, molecular switches, to nano wires and nanotubes. Accurately simulating such devices often requires a 2D or a full 3D model. This leads to a large computational expense. We review existing methods for the fast computation of the density of charge using the Schr?dinger-Poisson equation, and propose a new algorithm which has a significantly lower computational cost and is exact. The algorithm is applicable in the presence of various boundary conditions for the source, drain and gate regions, and for devices of arbitrary geometry. |