Variable-phase method and Levinson's theorem in two dimensions: Application to a screened Coulomb potential

摘要

Copyright © 1997 Elsevier. NOTICE: this is the pre-print version of a work that was accepted for publication in Solid State Communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Communications Volume 103, Issue 6, pp. 325–329 (1997). DOI: 10.1016/S0038-1098(97)00203-2