Transfer-matrix approach for modulated structures with defects
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, 37996-1200 (United States)
We consider scattering of electrons by defects in a periodically modulated, quasi-one-dimensional structure, within a tight-binding model. Combining a transfer matrix method and a Green function method we derive a formula for a Landauer conductance and show its equivalence to the result of Kubo linear response theory. We obtain explicitly unperturbed lattice Green functions from their equations of motion, using the transfer matrices. We apply the presented formalism in computations of the conductance of several multiband modulated structures with defects: (a) carbon nanotubes (b) two-dimensional (2D) superlattice (c) modulated leads with 1D wire in the tunneling regime. (c) 2000 The American Physical Society.
- OSTI ID:
- 20217210
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 62, Issue 4; Other Information: PBD: 15 Jul 2000; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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