Abstract
It is shown that all the universal properties of glasses can be explained in the framework of the Soft Potential Model (SPM). At low temperatures (below a few kelvin) this model is equivalent to the well-known model of two-level systems of Anderson, Halperin, Varma and Phillips, which explains quite well the universal low-temperature properties of glasses. The SPM predicts that in addition to two-level systems there are soft harmonic oscillators in glasses which are responsible for their universal behavior, especially at higher temperatures.Both the two-level systems and harmonic oscillators are described by anharmonic soft atomic potentials by the uniform way. They interact with phonons (or electric field) by means of bilinear terms with the same coupling constant for both types of low-energy excitations. The elastic interaction between soft atomic potentials leads to a density of the low-energy excitations, which does not depend on the concentration of defects in the glass structure.
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.
