Abstract
The strong-coupling approximation is investigated in a model one-dimensional δ potential. It is shown that even for large values of the overlap integrals S = 0.5 the approximation gives good results when a sufficiently large number of neighbors is taken into account. Otherwise, the approximation can give spurious extrema in the density of states. A modified strong-coupling method is formulated having considerable advantage over the usual method.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
