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Title

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

AuthorsPérez-Castañeda, Tomás; Jiménez Riobóo, R. J. ; Ramos, Miguel A.
Issue Date2014
PublisherAmerican Physical Society
CitationPhysical Review Letters 112: 165901 (2014)
AbstractThe 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.112.165901
URIhttp://hdl.handle.net/10261/99078
DOI10.1103/PhysRevLett.112.165901
Identifiersdoi: 10.1103/PhysRevLett.112.165901
e-issn: 1079-7114
issn: 0031-9007
Appears in Collections:(ICMM) Artículos
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