[PDF] A Search For The Origin Of Low Temperature Anomalies In Glasses eBook

Author : Miguel A Ramos
Publisher : World Scientific
Page : 505 pages
File Size : 28,45 MB
Release : 2022-08-11
Category : Science
ISBN : 1800612591

GET BOOK

This book, edited by M. A. Ramos and contributed by several reputed physicists in the field, presents a timely review on low-temperature thermal and vibrational properties of glasses, and of disordered solids in general. In 1971, the seminal work of Zeller and Pohl was published, which triggered this relevant research field in condensed matter physics. Hence, this book also commemorates about 50 years of that highlight with a comprehensive, updated review.In brief, glasses (firstly genuine amorphous solids but later on followed by different disordered crystals) were found to universally exhibit low-temperature properties (specific heat, thermal conductivity, acoustic and dielectric attenuation, etc.) unexpectedly very similar among them — and very different from those of their crystalline counterparts.These universal 'anomalies' of glasses and other disordered solids remain very controversial topics in condensed matter physics. They have been addressed exhaustively in this book, through many updated experimental data, a survey of most relevant models and theories, as well as by computational simulations.

Author : Roderick A.B. Devine
Publisher : Springer Science & Business Media
Page : 552 pages
File Size : 38,76 MB
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 1461310318

GET BOOK

The contents of this volume represent most of the papers presented either orally or as posters at the international conference held in Les rd th Arcs, Savoie, from June 29 to July 3 1987. The declared objective of the conference was to bring together specialists working in various fields, both academic and applied, to examine the state of our under standing of the physics of amorphous sioz from the point of view of its structure, defects (both intrinsic and extrinsic), its ability to trans port current and to trap charges, its sensitivity to irradiation, etc. For this reason, the proceedings is divided, as was the conference schedule, into a number of sections starting from a rather academic viewpoint of the internal structure of idealized Si0 and progressing 2 towards subjects of increasing technological importance such as charge transport and trapping and breakdown in thin films. The proceedings terminates with a section on novel applications of amorphous SiOz and in particular, buried oxide layers formed by ion implantation. Although every effort was made at the conference to ensure that each presentation occured in its most obvious session, in editing the proceedings we have taken the liberty of changing the order where it seems that a paper was in fact more appropriate to an alternative section. In any event, because of the natural overlap of subjects, many papers could have been suitably placed in several different sections.

Author : Michael I. Klinger
Publisher : World Scientific
Page : 339 pages
File Size : 11,62 MB
Release : 2013
Category : Science
ISBN : 9814407488

GET BOOK

The present book describes the fundamental features of glassy disordered systems at high temperatures (close to the liquid-to-glass transition) and for the first time in a book, the universal anomalous properties of glasses at low energies (i.e. temperatures/frequencies lower than the Debye values) are depicted. Several important theoretical models for both the glass formation and the universal anomalous properties of glasses are described and analyzed. The origin and main features of soft atomic-motion modes and their excitations, as well as their role in the anomalous properties, are considered in detail. It is shown particularly that the soft-mode model gives rise to a consistent description of the anomalous properties. Additional manifestations of the soft modes in glassy phenomena are described. Other models of the anomalous glassy properties can be considered as limit cases of the soft-mode model for either very low or moderately low temperatures/frequencies.