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This program, written originally by Richard Akis of Arizona State University, Tempe, Arizona, in fortran 90, calculates the conductance and associated wavefunctions for electron waves flowing through one or more quantum point contacts (QPCs), as a function of either bottom potential or magnetic field. It uses a transfer/scattering matrix approach to find the coefficients that enter the Landauer formula to calculate the conductance. The quantum point contact that has been implemented is based on a model suggested by Ando (T. Ando, "Quantum Point Contacts in Magnetic Fields", Phys. Rev. B, vol 44, pp 8017, 1991."
Richard Akis (ASU), Shaikh S. Ahmed (SIU), and David Ferry (ASU)
Shaikh S. Ahmed would like to acknowledge the computational support from NSF 0855221 CRI II: Southern Illinois High-Performance Computing Infrastructure (SIHPCI)
Cite this work
Researchers should cite this work as follows:
T. Ando, "Quantum Point Contacts in Magnetic Fields", Phys. Rev. B, vol 44, pp 8017, 1991.