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Chapter
Soft Transverse Phonons in an Amorphous Metal
In the search for high-transition-temperature superconductors it has been recognized that low atomic vibrational frequencies can lead to an enhancement of T c .1 Exper...
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Chapter
Relaxation Times of Tunneling Systems in Glasses
The purpose of this chapter is 1) to review experiments which provide information on two-level system relaxation times in glasses, 2) to relate these relaxation times to the specific physical processes respons...
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Chapter and Conference Paper
Rotary Phonon Echoes in Silica Glass
Acoustic resonance experiments have played a central role in develo** a quantitative picture of the low-temperature properties of glasses [1,2]. The strong coupling between phonons and two-level tunneling sy...
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Chapter
Transport, Relaxation and Absorption in Amorphous Semiconductors
The response of non-crystalline semiconductors to alternating fields from d.c. to microwave frequencies is reviewed. Theoretical treatments appropriate to various physical models are outlined and the degree to...
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Chapter
Coherent Phenomena in Glasses
Concepts underlying and experiments revealing coherent phenomena in glasses and other disordered solids are reviewed. The description of low energy excitations in glasses in terms of “two level systems” (TLS) ...
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Chapter
Basic Amorphography
An account is presented of the quantification of amorphous network structures. Experimental techniques for the investigation of such structures are discussed and it is demonstrated that modern instrumentation ...
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Chapter
Optical Properties of the Chalcogenide Glasses
Glasses containing group VI elements, other than oxygen, are essentially covalent and exhibit thermally-activated electrical conductivities which are analogous to those observed in intrinsic crystalline semico...
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Chapter
Thermal and Acoustic Experiments in Low Temperature Glasses
The low-temperature thermal, acoustic and dielectric properties of glasses differ largely from those of corresponding crystals. Specific heat is enhanced and varies linearly with temperature, whereas thermal c...
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Chapter and Conference Paper
The Thermal Conductivity Plateau in Disordered Systems
The thermal conductivity of disordered substances exhibits a region of weak temperature dependence known as the “plateau” [1]. It occurs in glasses in a temperature range typically between 1 and 20 K. At much ...
