Breakdown of intermediate-range order in liquid GeSe2 at high pressure

Wilson A. Crichton (), Mohamed Mezouar, Tor Grande, Svein Stølen and Andrzej Grzechnik
Additional contact information
Wilson A. Crichton: European Synchrotron Radiation Facility, BP 220
Mohamed Mezouar: European Synchrotron Radiation Facility, BP 220
Tor Grande: Norwegian University of Science and Technology
Svein Stølen: University of Oslo
Andrzej Grzechnik: Max-Planck-Institut für Festkörperforschung

Nature, 2001, vol. 414, issue 6864, 622-625

Abstract: Abstract Studies of liquids with tetrahedral coordination, particularly during compression or quenching, have indicated the existence of distinct phases1,2,3 in the liquid state, distinguishable by density and local structure. In systems that exhibit critical phenomena in the supercooled state, anomalous behaviour of the compressibility is also anticipated above the critical point, as revealed by simulations of water4. Liquid GeSe2 is a potentially attractive system for studying both types of phenomena, given its two-dimensional tetrahedral structure and anomalous physical properties (including a density minimum near its melting point). Here we report in situ X-ray diffraction measurements of solid and liquid GeSe2 at high temperature and high pressure, revealing that the structure of the liquid is sensitive to pressure and that anomalous compressibility is expected. During compression of liquid GeSe2, the connectivity of the liquid changes from two- to three-dimensional, leading to a breakdown of the intermediate-range order. The gradual change in structure above the melting line may develop to a first-order liquid–liquid transition in the supercooled regime.

Date: 2001
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/414622a Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:414:y:2001:i:6864:d:10.1038_414622a

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/414622a

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().