X-ray diffraction and equation of state of the C–S–H room-temperature superconductor
Abstract
X-ray diffraction indicates that the structure of the recently discovered carbonaceous sulfur hydride (C–S–H) room-temperature superconductor is derived from previously established van der Waals compounds found in the H2S–H2 and CH4–H2 systems. Crystals of the superconducting phase were produced by a photochemical synthesis technique, leading to the superconducting critical temperature Tc of 288 K at 267 GPa. X-ray diffraction patterns measured from 124 to 178 GPa, within the pressure range of the superconducting phase, are consistent with an orthorhombic structure derived from the Al2Cu-type determined for (H2S)2H2 and (CH4)2H2 that differs from those predicted and observed for the S–H system at these pressures. The formation and stability of the C–S–H compound can be understood in terms of the close similarity in effective volumes of the H2S and CH4 components, and denser carbon-bearing S–H phases may form at higher pressures. Furthermore, the results are crucial for understanding the very high superconducting Tc found in the C–S–H system at megabar pressures.
- Authors:
-
- Univ. of Illinois, Chicago, IL (United States)
- Univ. of Rochester, NY (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF); Chicago/DOE Alliance Center (CDAC)
- OSTI Identifier:
- 1839908
- Alternate Identifier(s):
- OSTI ID: 1821225
- Grant/Contract Number:
- AC02-06CH11357; NA0003975; SC0020340; DMR-1933622; DMR-1809649; EAR-1634415
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Chemical Physics
- Additional Journal Information:
- Journal Volume: 155; Journal Issue: 11; Journal ID: ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; diamond anvil cells; superconductivity; doping; superconductors; x-ray diffraction; phase transitions; raman spectroscopy; equations of state; perovskites
Citation Formats
Lamichhane, Anmol, Kumar, Ravhi, Ahart, Muhtar, Salke, Nilesh P., Dasenbrock-Gammon, Nathan, Snider, Elliot, Meng, Yue, Lavina, Barbara, Chariton, Stella, Prakapenka, Vitali B., Somayazulu, Maddury, Dias, Ranga P., and Hemley, Russell J. X-ray diffraction and equation of state of the C–S–H room-temperature superconductor. United States: N. p., 2021.
Web. doi:10.1063/5.0064750.
Lamichhane, Anmol, Kumar, Ravhi, Ahart, Muhtar, Salke, Nilesh P., Dasenbrock-Gammon, Nathan, Snider, Elliot, Meng, Yue, Lavina, Barbara, Chariton, Stella, Prakapenka, Vitali B., Somayazulu, Maddury, Dias, Ranga P., & Hemley, Russell J. X-ray diffraction and equation of state of the C–S–H room-temperature superconductor. United States. https://doi.org/10.1063/5.0064750
Lamichhane, Anmol, Kumar, Ravhi, Ahart, Muhtar, Salke, Nilesh P., Dasenbrock-Gammon, Nathan, Snider, Elliot, Meng, Yue, Lavina, Barbara, Chariton, Stella, Prakapenka, Vitali B., Somayazulu, Maddury, Dias, Ranga P., and Hemley, Russell J. Tue .
"X-ray diffraction and equation of state of the C–S–H room-temperature superconductor". United States. https://doi.org/10.1063/5.0064750. https://www.osti.gov/servlets/purl/1839908.
@article{osti_1839908,
title = {X-ray diffraction and equation of state of the C–S–H room-temperature superconductor},
author = {Lamichhane, Anmol and Kumar, Ravhi and Ahart, Muhtar and Salke, Nilesh P. and Dasenbrock-Gammon, Nathan and Snider, Elliot and Meng, Yue and Lavina, Barbara and Chariton, Stella and Prakapenka, Vitali B. and Somayazulu, Maddury and Dias, Ranga P. and Hemley, Russell J.},
abstractNote = {X-ray diffraction indicates that the structure of the recently discovered carbonaceous sulfur hydride (C–S–H) room-temperature superconductor is derived from previously established van der Waals compounds found in the H2S–H2 and CH4–H2 systems. Crystals of the superconducting phase were produced by a photochemical synthesis technique, leading to the superconducting critical temperature Tc of 288 K at 267 GPa. X-ray diffraction patterns measured from 124 to 178 GPa, within the pressure range of the superconducting phase, are consistent with an orthorhombic structure derived from the Al2Cu-type determined for (H2S)2H2 and (CH4)2H2 that differs from those predicted and observed for the S–H system at these pressures. The formation and stability of the C–S–H compound can be understood in terms of the close similarity in effective volumes of the H2S and CH4 components, and denser carbon-bearing S–H phases may form at higher pressures. Furthermore, the results are crucial for understanding the very high superconducting Tc found in the C–S–H system at megabar pressures.},
doi = {10.1063/5.0064750},
journal = {Journal of Chemical Physics},
number = 11,
volume = 155,
place = {United States},
year = {Tue Sep 21 00:00:00 EDT 2021},
month = {Tue Sep 21 00:00:00 EDT 2021}
}
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