DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [2];  [3];  [4]; ORCiD logo [1];  [1];  [3]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Illinois, Chicago, IL (United States)
  2. Univ. of Rochester, NY (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. 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}
}

Works referenced in this record:

High-Pressure Compounds in Methane-Hydrogen Mixtures
journal, March 1996


Dissociation of methane under high pressure
journal, October 2010

  • Gao, Guoying; Oganov, Artem R.; Ma, Yanming
  • The Journal of Chemical Physics, Vol. 133, Issue 14
  • DOI: 10.1063/1.3488102

Room-temperature superconductivity in a carbonaceous sulfur hydride
journal, October 2020


Properties of diamond under hydrostatic pressures up to 140 GPa
journal, February 2003

  • Occelli, Florent; Loubeyre, Paul; LeToullec, René
  • Nature Materials, Vol. 2, Issue 3
  • DOI: 10.1038/nmat831

X-ray diffraction and equation of state of hydrogen at megabar pressures
journal, October 1996

  • Loubeyre, P.; LeToullec, R.; Hausermann, D.
  • Nature, Vol. 383, Issue 6602
  • DOI: 10.1038/383702a0

X-ray diffraction studies and equation of state of methane at 202GPa
journal, April 2009


The pressure-temperature phase and transformation diagram for carbon; updated through 1994
journal, January 1996


The metallization and superconductivity of dense hydrogen sulfide
journal, May 2014

  • Li, Yinwei; Hao, Jian; Liu, Hanyu
  • The Journal of Chemical Physics, Vol. 140, Issue 17
  • DOI: 10.1063/1.4874158

Bonding Changes in Compressed Superhard Graphite
journal, October 2003


Hole-doped room-temperature superconductivity in H3S1-xZ (Z=C, Si)
journal, December 2020


Pressure-induced superconducting ternary hydride H3SXe: A theoretical investigation
journal, August 2018


Structure and compression of crystalline methane at high pressure and room temperature
journal, August 1980

  • Hazen, R. M.; Mao, H. K.; Finger, L. W.
  • Applied Physics Letters, Vol. 37, Issue 3
  • DOI: 10.1063/1.91909

Potential high- T c superconducting lanthanum and yttrium hydrides at high pressure
journal, June 2017

  • Liu, Hanyu; Naumov, Ivan I.; Hoffmann, Roald
  • Proceedings of the National Academy of Sciences, Vol. 114, Issue 27
  • DOI: 10.1073/pnas.1704505114

Superconductivity at 250 K in lanthanum hydride under high pressures
journal, May 2019


Crystal structure of graphite under room-temperature compression and decompression
journal, July 2012

  • Wang, Yuejian; Panzik, Joseph E.; Kiefer, Boris
  • Scientific Reports, Vol. 2, Issue 1
  • DOI: 10.1038/srep00520

Anomalous High‐Temperature Superconductivity in YH 6
journal, March 2021

  • Troyan, Ivan A.; Semenok, Dmitrii V.; Kvashnin, Alexander G.
  • Advanced Materials, Vol. 33, Issue 15
  • DOI: 10.1002/adma.202006832

Pressure-induced metallization of dense (H2S)2H2 with high-Tc superconductivity
journal, November 2014

  • Duan, Defang; Liu, Yunxian; Tian, Fubo
  • Scientific Reports, Vol. 4, Issue 1
  • DOI: 10.1038/srep06968

Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system
journal, August 2015

  • Drozdov, A. P.; Eremets, M. I.; Troyan, I. A.
  • Nature, Vol. 525, Issue 7567
  • DOI: 10.1038/nature14964

DIOPTAS : a program for reduction of two-dimensional X-ray diffraction data and data exploration
journal, May 2015


Evidence for Superconductivity above 260 K in Lanthanum Superhydride at Megabar Pressures
journal, January 2019


Superconductivity up to 243 K in the yttrium-hydrogen system under high pressure
journal, August 2021


Crystal structure of the superconducting phase of sulfur hydride
journal, May 2016

  • Einaga, Mari; Sakata, Masafumi; Ishikawa, Takahiro
  • Nature Physics, Vol. 12, Issue 9
  • DOI: 10.1038/nphys3760

Superconductivity at  100 K in dense SiH4(H2)2 predicted by first principles
journal, August 2010

  • Li, Y.; Gao, G.; Xie, Y.
  • Proceedings of the National Academy of Sciences, Vol. 107, Issue 36
  • DOI: 10.1073/pnas.1007354107