Key points are not available for this paper at this time.
ABSTRACT Recently, Ksenofontov et al., (arXiv:2510.03256) observed ambient pressure room‐temperature superconductivity in graphite intercalated with lithium‐based alloys with transition temperature (according to magnetization measurements) . Here, I analyzed the reported temperature‐dependent resistivity data in these graphite‐intercalated samples and found that is well described by the model of two series resistors, where each resistor is described as either an Einstein conductor or a Bloch‐Grüneisen conductor. Deduced Einstein and Debye temperatures are and , and and , respectively. Following the McMillan formalism, the electron‐phonon coupling constant was calculated. This value of is approximately equal to in highly compressed near‐room‐temperature superconducting hydrides. Based on this, I can propose that the observed room‐temperature superconductivity in intercalated graphite is localized in nanoscale Sr–Ca–Li metallic flakes/particles, which adopt the phonon spectrum from the surrounding bulk graphite matrix. As a result, conventional electron‐phonon superconductivity arises in these nano‐flakes/nanoparticles at room temperature. Experimental data reported by Ksenofontov et al., (arXiv:2510.03256) on trapped magnetic flux decay in intercalated graphite samples support the proposition. Based on the above, there is a call for first‐principles calculations quest for the high‐temperature and room‐temperature superconductivity in composite materials.
Evgeny F. Talantsev (Mon,) studied this question.