Dislocation scattering: a new Hamiltonian for describing multivalued elastic displacement fields
- 1 December 1979
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 9 (12), L241-L245
- https://doi.org/10.1088/0305-4608/9/12/002
Abstract
A new procedure for treating the scattering of electrons or phonons by the multivalued elastic displacement fields of dislocations is developed on the basis of the tight-binding model used recently by Kawamura (1978) to describe screw dislocations. It is equivalent, in the continuum limit, to applying a multivalued coordinate transformation to the free-electron Hamiltonian and then seeking a single-valued solution of the resulting eigenvalue equation. This provides a kinematic scattering mechanism that is independent of the details of the lattice potential. Such a mechanism is indicated by the uniformity of the experimental data on dislocation resistivity.Keywords
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