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Chin. Phys. B, 2016, Vol. 25(4): 046102    DOI: 10.1088/1674-1056/25/4/046102
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Pressure-induced solidifications of liquid sulfur below and above λ-transition

Fei Tang(唐菲)1, Lin-Ji Zhang(张林基)1, Feng-Liang Liu(刘峰良)2, Fei Sun(孙菲)2, Wen-Ge Yang(杨文革)2, Jun-Long Wang(王君龙)2, Xiu-Ru Liu(刘秀茹)3, Ru Shen(沈如)1
1School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu 610031, China 2Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China 3High Pressure Synergetic Consortium (HPSynC), Geophysical Laboratory, Carnegie Institute of Washington, Illinois 60439, USA 4Analyses and Test Center, Southwest Jiaotong University, Chengdu 610031, China
Abstract  Two kinds of glassy sulfurs are synthesized by the rapid compression method from liquid sulfur at temperatures below and above the λ-transition point. The glassy sulfur has different colors and transparencies, depending on temperature, which may inherit some structural information from the λ-transition. Raman spectrum studies of these samples show that a large fraction of polymeric chains exist in the glassy sulfur, even in the one solidified from T < Tλ. We find that a higher compression rate instead of a higher temperature of the parent liquid captures more polymeric chains. Pressure-induced glassy sulfur presents high thermal stability compared with temperature quenched glassy sulfur and could transform into liquid sulfur directly without crystallization through an abnormal exothermic melting course. High energy x-ray diffraction is utilized to study the local order of the pressure-induced glassy sulfur.
Keywords:  glassy sulfur      λ-transition      exothermic melting      pressure jump  
Received:  30 October 2015      Revised:  09 December 2015      Published:  05 April 2016
PACS:  61.43.-j (Disordered solids)  
  81.40.Vw (Pressure treatment)  
  64.70.Ja (Liquid-liquid transitions)  
Fund: Project supported by the Joint Funds of the National Natural Science Foundation of China (Grant No. U1530402), the National Natural Science Foundation of China (Grant No. 11004163), the Fundamental Research Funds for the Central Universities, China (Grant No. 2682014ZT31), the Department of Energy National Nuclear Security Administration (Grant No. DE-NA0001974), and the Department of Energy Basic Energy Sciences (Grant Nos. DE-FG02-99ER45775 and DE-AC02-06CH11357).
Corresponding Authors:  Wen-Ge Yang, Xiu-Ru Liu     E-mail:  yangwg@hpstar.ac.cn;xrliu@swjtu.edu.cn

Cite this article: 

Fei Tang(唐菲), Lin-Ji Zhang(张林基), Feng-Liang Liu(刘峰良), Fei Sun(孙菲), Wen-Ge Yang(杨文革), Jun-Long Wang(王君龙), Xiu-Ru Liu(刘秀茹), Ru Shen(沈如) Pressure-induced solidifications of liquid sulfur below and above λ-transition 2016 Chin. Phys. B 25 046102

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