Intrinsic Electric Dipole Moment of Tunneling Systems in Silica Glasses

作者：Brage Golding, Manfred von Schickfus, Siegfried Hunklinger, Klaus Dransfeld · 发表于：Physical Review Letters · 年份：1979 · DOI：10.1103/physrevlett.43.1817 · 被引用次数：115 · 研究领域：Glass properties and applications、Quantum optics and atomic interactions、Solid-state spectroscopy and crystallography

Coherent electric echo magnitudes and decay rates have been studied systematically in four silica glasses with differing OH concentrations at a frequency of 0.7 GHz and to temperatures as low as 19 mK. Echoes have been observed in glasses with negligible OH content and originate from intrinsic tunneling systems possessing a mean electric dipole moment of approximately 0.5 D. We show that the OH in fused silica is associated with a distinct extrinsic tunneling species with a larger dipole moment and weaker phonon coupling.