High-pressure EXAFS measurements of crystalline Ge using nanocrystalline diamond anvils

Autor:	Sakura Pascarelli, Wenge Yang, Giuliana Aquilanti, Wendy L. Mao, Li Zhang, Yang Ding, Matías Baldini
Rok vydání:	2011
Předmět:	Superconductivity Diffraction Materials science Extended X-ray absorption fine structure Phonon Thermoelectric effect Shell (structure) Condensed Matter Physics Absorption (electromagnetic radiation) Molecular physics Electronic Optical and Magnetic Materials Amorphous solid
Zdroj:	Physical Review B. 84
ISSN:	1550-235X 1098-0121
DOI:	10.1103/physrevb.84.014111
Popis:	High-pressure extended x-ray absorption fine structure (EXAFS) measurements on crystalline Ge demonstrate that the use of nanocrystalline diamond anvils can solve the glitch problem from single crystal diamond anvils and improve the quality of the data. Our results indicate that using nanocrystalline diamond anvils for high-pressure EXAFS research can provide a large enough energy range for structural study up to four coordination shell distances. In particular, we obtained the pressure evolution of mean square relative displacement for the first neighbor shells of crystalline Ge and observed different correlation effects for different coordination shells. The use of nanocrystalline diamond anvils will provide a breakthrough for high-pressure EXAFS study, especially for amorphous compounds in which only limited structural information can be obtained by diffraction techniques.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b82f5ef8a2ea3fcf8b05c0893a9dae28 https://doi.org/10.1103/physrevb.84.014111 Zobrazit plný text záznamu