Double Aharonov-Bohm effect in a medium with a linear topological defect

We have studied the changes introduced by the linear magnetic flux on the e nergy spectrum of a free particle confined to move between two cylindrical concentrical shells in a space with a linear defect, that is the combinatio n of a disclination and a dislocation which is called dispiration. One can verify in addition that the change in topology caused by the combined produ ces modifications in the spectrum of the energy. (C) 2001 Elsevier Science BN. All rights reserved.