Probing the different spatial scales of Kel F-800 polymeric glass under pressure

TY - JOUR

T1 - Probing the different spatial scales of Kel F-800 polymeric glass under pressure

AU - Stavrou, Elissaios

AU - Ahart, Muhtar

AU - Mahmood, Mohammad F.

AU - Goncharov, Alexander F.

N1 - Funding Information: E. S. would like to thank C. Raptis for fruitful discussions and critical reading of the manuscript. The authors would like to thank D. M. Dattelbaum for the Kel F-800 polymer samples, also V. Prakapenka and GSECARS staff for help in conducting synchrotron experiments. We thank V. V. Struzkin and B. Mysen for useful comments on the manuscript. This work was supported by the US Army Research Office, the Carnegie/DOE Alliance Center and DARPA. GSECARS is supported by the National Science Foundation Earth Sciences (EAR-0622171) and Department of Energy Geosciences (DE-FG02-94ER14466). Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

PY - 2013

Y1 - 2013

N2 - One of the fundamental open questions in condensed matter science is the origin of the unique universal characteristics of glasses. Among them, the Boson peak (BP) and the first sharp diffraction peak (FSDP) are directly related with the disordered nature of these solids. The lack of widely accepted understanding of the origin of these features makes the characterization of glass forming systems on the microscopic level challenging. Moreover a strong and open debate exists on the possible correlation between BP and FSDP and its origin. Here we present the first detailed concomitant Raman and x-ray diffraction study of these two features under hydrostatic pressure. Surprisingly, we find that the previously proposed correlations between the positions of BP and FSDP do not hold under pressure. Based on the anticorrelation of the characteristic dimensions, we conclude that, BP and FSDP probe different spatial scales corresponding to dynamical and structural dimensions, respectively.

AB - One of the fundamental open questions in condensed matter science is the origin of the unique universal characteristics of glasses. Among them, the Boson peak (BP) and the first sharp diffraction peak (FSDP) are directly related with the disordered nature of these solids. The lack of widely accepted understanding of the origin of these features makes the characterization of glass forming systems on the microscopic level challenging. Moreover a strong and open debate exists on the possible correlation between BP and FSDP and its origin. Here we present the first detailed concomitant Raman and x-ray diffraction study of these two features under hydrostatic pressure. Surprisingly, we find that the previously proposed correlations between the positions of BP and FSDP do not hold under pressure. Based on the anticorrelation of the characteristic dimensions, we conclude that, BP and FSDP probe different spatial scales corresponding to dynamical and structural dimensions, respectively.

UR - http://www.scopus.com/inward/record.url?scp=84874321955&partnerID=8YFLogxK

U2 - 10.1038/srep01290

DO - 10.1038/srep01290

M3 - 文章

C2 - 23411501

AN - SCOPUS:84874321955

SN - 2045-2322

VL - 3

JO - Scientific Reports

JF - Scientific Reports

M1 - 1290

ER -