Quantum Waveguide Transport in Serial Stub and Loop Structures

Details Quantum Waveguide Transport in Serial Stub and Loop Structures Quantum Waveguide Transport in Serial Stub and Loop Structures

1994-11-05

arxiv.org/abs/cond-mat/9411028v1

Physics

Condensed Matter

Revtex 3.2 version, 27 pages, figures available on request, To appear in Phys. Rev. B

Scientific paper

We have studied the quantum transmission properties of serial stub and loop structures. Throughout we have considered free electron networks and the scattering arises solely due to the geometric nature of the problem. The band formation in these geometric structures is analyzed and compared with the conventional periodic potential scatterers. Some essential differences are pointed out. We show that a single defect in an otherwise periodic structure modifies band properties non trivially. By a proper choice of a single defect one can produce positive energy bound states in continuum in the sense of von Neumann and Wigner. We also discuss some magnetic properties of loop structures in the presence of Aharonov-Bohm flux.

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