Dresden 2003 – scientific programme

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HL: Halbleiterphysik

HL 42: Bauelemente I

HL 42.4: Talk

Thursday, March 27, 2003, 12:30–12:45, BEY/118

Efficient calculation of ballistic quantum transport in 2D and 3D — •Matthias Sabathil, Denis Mamaluy, and Peter Vogl — Walter Schottky Institut, Technische Universitaet Muenchen, Am Coulombwall, 85748 Garching, Germany

We present an efficient method to calculate the ballistic transmission function and current of an arbitrarily shaped, multi-terminal two- or three-dimensional open device. We show that the calculation of the energy dependent transmission function can be reduced to a single calculation of the stationary states of the isolated device and the inversion of a small matrix that is energy dependent. The size of this matrix is shown to be governed by the size of the boundary region between the leads and the device. Using this method we calculated the transmission of T-shaped quantum interference transistor which exhibits large conductivity oscillations as a function of the applied gate voltage.