What superconducts in sulfur hydrides under pressure and why

@article{Bernstein2015WhatSI,
  title={What superconducts in sulfur hydrides under pressure and why},
  author={Noam Bernstein and C. Stephen Hellberg and Michelle D. Johannes and Igor I. Mazin and Michael J. Mehl},
  journal={Physical Review B},
  year={2015},
  volume={91},
  pages={060511}
}
The recent discovery of superconductivity at 190~K in highly compressed H$_{2}$S is spectacular not only because it sets a record high critical temperature, but because it does so in a material that appears to be, and we argue here that it is, a conventional strong-coupling BCS superconductor. Intriguingly, superconductivity in the observed pressure and temperature range was predicted theoretically in a similar compound H$_{3}$S. Several important questions about this remarkable result, however… 

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References

SHOWING 1-10 OF 12 REFERENCES
"J."
however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)
Phys
  • Rev. B 59, 1743 (1999); I. Opahle, K. Koepernik, and H. Eschrig, ibid. 60, 14035
  • 1999
Nature Physics 3
  • 473
  • 2007
Nature Materials 4
  • 152
  • 2005
PRL 86
  • 5771
  • 2001
Phys
  • Rev. Lett. 86
  • 2001
Phys
  • Rev. B 59, 1758
  • 1999
Phys
  • Rev. Lett. 77, 3865 (1996); J. P. Perdew, K. Burke, and M. Ernzerhof, Phys. Rev. Lett. 78, 1396
  • 1997
Comput
  • Mat. Sci. 6, 15 (1996); G. Kresse and J. Furthmüller, Phys. Rev. B 54, 11169
  • 1996
Phys
  • Rev. B 50, 17953
  • 1994
...
1
2
...