  The search for room-temperature superconducting materials has been at the
center of modern research for decades. The recent discovery of high-temperature
superconductivity, under extreme pressure in hydrogen-rich materials, is a
tremendous achievement in this research front. This discovery offers a route in
the search for room temperature superconductivity at ambient pressure. The
superconductivity of these hydrogen-rich materials was confirmed by the
observation of zero-resistance, isotope effects, effect of magnetic field, and
other standard properties. However, some of the experimental features were
puzzling as they were not consistent with the known superconductivity theories.
These debatable features have lead to a series of recent publications
downplaying the existence of superconductivity in these superhydrides. Here we
propose a concept of massive electrons under pressure and successfully explain
all non-standard experimental observations. Our massive electron concept
explains the large effective mass of the quasiparticles, the reason for the
high critical temperatures for moderate electron-phonon couplings, and a 3-5
orders of magnitude larger conductivity causing a narrow resistivity broadening
at the transition in the presence of magnetic field. We anticipate our findings
will lead to a new directions and tweaks in current research in the search for
ambient-pressure, room-temperature superconductors.

Superconductivity;Materials Science;Strongly Correlated Electrons