Experimental evidence of the Frenkel line in supercritical neon
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 Pc and 6.6 Tc. 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. Here, 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.
- Authors:
-
- Univ. zu Köln (Germany)
- Russian Academy of Sciences, Moscow (Russia)
- Univ. of Chicago, IL (United States)
- Queen Mary Univ. of London (United Kingdom)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF)
- OSTI Identifier:
- 1353264
- Alternate Identifier(s):
- OSTI ID: 1353277
- Grant/Contract Number:
- AC02-06CH11357; FG02-94ER14466; EAR 11-57758; EAR1128799
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: 13; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; critical phenomena; phase transitions; specific phase transitions; classical fluids; liquids; molecular dynamics; X-ray pair-distribution function analysis; statistical physics; condensed matter & materials physics
Citation Formats
Prescher, C., Fomin, Yu. D., Prakapenka, V. B., Stefanski, J., Trachenko, K., and Brazhkin, V. V. Experimental evidence of the Frenkel line in supercritical neon. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.95.134114.
Prescher, C., Fomin, Yu. D., Prakapenka, V. B., Stefanski, J., Trachenko, K., & Brazhkin, V. V. Experimental evidence of the Frenkel line in supercritical neon. United States. https://doi.org/10.1103/PhysRevB.95.134114
Prescher, C., Fomin, Yu. D., Prakapenka, V. B., Stefanski, J., Trachenko, K., and Brazhkin, V. V. Wed .
"Experimental evidence of the Frenkel line in supercritical neon". United States. https://doi.org/10.1103/PhysRevB.95.134114. https://www.osti.gov/servlets/purl/1353264.
@article{osti_1353264,
title = {Experimental evidence of the Frenkel line in supercritical neon},
author = {Prescher, C. and Fomin, Yu. D. and Prakapenka, V. B. and Stefanski, J. and Trachenko, K. and Brazhkin, V. V.},
abstractNote = {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 Pc and 6.6 Tc. 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. Here, 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.},
doi = {10.1103/PhysRevB.95.134114},
journal = {Physical Review B},
number = 13,
volume = 95,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2017},
month = {Wed Apr 26 00:00:00 EDT 2017}
}
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