Universität zu Köln

Prescher, C., Fomin, Yu. D., Prakapenka, V. B., Stefanski, J., Trachenko, K. and Brazhkin, V. V. (2017). Experimental evidence of the Frenkel line in supercritical neon. Phys. Rev. B, 95 (13). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Recent research suggests that the supercritical state consists of liquidlike and gaslike states where particle dynamics and key system properties are qualitatively different. We report experimental evidence of the structural crossover in supercritical neon at pressure and temperature conditions significantly exceeding the critical point values: 250 P-c and 6.6 T-c. The experimental results show a crossover of the medium-range order structure evidenced by the change of the structure factor with pressure. We also observe the crossover of the short-range order structure indicated by changes in the coordination number. The relative width of the crossover is fairly narrow and is smaller than 10-12% in pressure and temperature. By comparing our experimental results with molecular dynamics simulations, we suggest that the observed crossover can be attributed to the Frenkel line and discuss the relationship between the structural crossover and qualitative changes of dynamical and thermodynamic properties of supercritical matter.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Prescher, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fomin, Yu. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Prakapenka, V. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stefanski, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Trachenko, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brazhkin, V. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-233673
DOI:	10.1103/PhysRevB.95.134114
Journal or Publication Title:	Phys. Rev. B
Volume:	95
Number:	13
Date:	2017
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language WIDOM LINE; CROSSOVER; TRANSITION; SYSTEMS Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23367