Abstract
We propose an efficient method for subband calculations of cylindrical nanowire transistors with an arbitrary channel orientation. To perform the subband calculation efficiently, the wavefunctions are expanded using Fourier harmonics. It is confirmed that the use of an approximate isotropic effective mass introduces an error in the subband calculation due to the incorrectly calculated potential energy. A comparison with the results obtained in the Cartesian coordinate system confirms the accuracy of our method. Moreover, the simulation time required to obtain the self-consistent solution is significantly reduced.
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