Quantum Point Contact

By Richard Akis1, Shaikh S. Ahmed2, Mohammad Zunaidur Rashid, David K. Ferry1

1. Arizona State University 2. Southern Illinois University Carbondale

Simulates the conductance and associated wavefunctions of Quantum Point Contacts.

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Version 1.1.1 - published on 02 Feb 2015

doi:10.4231/D3H70817B cite this

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Abstract

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."

Credits

 Richard Akis (ASU), Shaikh S. Ahmed (SIU), and David Ferry (ASU)

Sponsored by

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.

  • Richard Akis; Shaikh S. Ahmed; Mohammad Zunaidur Rashid; David K. Ferry (2015), "Quantum Point Contact," http://nanohub.org/resources/qpc. (DOI: 10.4231/D3H70817B).

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