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Título

Two-level systems and boson peak remain stable in 110-million-year-old amber glass

Autor Pérez-Castañeda, Tomás; Jiménez Riobóo, R. J. ; Ramos, Miguel A.
Fecha de publicación 2014
EditorAmerican Physical Society
Citación Physical Review Letters 112: 165901 (2014)
ResumenThe two most prominent and ubiquitous features of glasses at low temperatures, namely the presence of tunneling two-level systems and the so-called boson peak in the reduced vibrational density of states, are shown to persist essentially unchanged in highly stabilized glasses, contrary to what was usually envisaged. Specifically, we have measured the specific heat of 110 million-year-old amber samples from El Soplao (Spain), both at very low temperatures and around the glass transition Tg. In particular, the amount of two-level systems, assessed at the lowest temperatures, was surprisingly found to be exactly the same for the pristine hyperaged amber as for the, subsequently, partially and fully rejuvenated samples. © 2014 American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.112.165901
URI http://hdl.handle.net/10261/99078
DOI10.1103/PhysRevLett.112.165901
Identificadoresdoi: 10.1103/PhysRevLett.112.165901
e-issn: 1079-7114
issn: 0031-9007
Aparece en las colecciones: (ICMM) Artículos
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