Abstract
We have investigated the anomalous rearrangement of the acoustic-phonon spectrum in a one-dimensional disordered system with increasing the heavy substitutional impurity concentration. The analysis shows that the anomalous spectrum rearrangement bears certain features of the normal cross-type spectrum rearrangement for the impurity concentration exceeding a certain concentration, the so-called second critical concentration ${c}_{s}$. Numerical simulation results for randomly disordered chains confirm the proposed criterion for the validity of the coherent potential approximation.
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.
