  A new experimental study by Snider et al. [Nature 586, 373-377 (2020)]
reported behavior in a high-pressure carbon-sulfur-hydrogen system that has
been interpreted by the authors as superconductivity at room temperature. The
sudden drop of electrical resistance at a critical temperature and the change
of the R vs. T behavior with an applied magnetic field point to
superconductivity. This is a very exciting study in one of the most important
areas of science, hence, it is crucial for the community to investigate these
findings and hopefully reproduce these results. In this comment, we present
calculations that expand upon the arguments put forth by Hirsch and Marsiglio
[arXiv:2010.10307], and offer some speculations about physical mechanisms that
might explain the observed data. In agreement with Hirsch and Marsiglio, we
show that there are errors in the analysis presented in the experimental paper,
and with the correct analysis, the reported R vs. T data significantly deviate
from the expected behavior. In particular, the extremely sharp change in
resistance at the superconducting transition is not consistent with a strongly
type II superconductor.
