Comment on “Superconducting state of Ca-VII below a critical temperature of 29 K at a pressure of 216 GPa”
2011 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 84, no 21Article in journal (Refereed) Published
In a recent paper, Sakata et al. [ Phys. Rev. B 83 220512 (2011)] report on superconductivity at 29 K in Ca under high pressure. Here, I argue that their method to define the onset of the superconducting transition temperature from resistivity measurements is misleading and that the correct value for the onset of the transition based on resistivity data shown in their paper should be 21 K. The discrepancy between these two temperatures is explained by superconducting fluctuations occurring at temperatures above the superconducting transition temperature.
Place, publisher, year, edition, pages
2011. Vol. 84, no 21
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-50710DOI: 10.1103/PhysRevB.84.216501ISI: 000297762300008ScopusID: 2-s2.0-84855297339OAI: oai:DiVA.org:kth-50710DiVA: diva2:462431
QC 201112092011-12-072011-12-072011-12-09Bibliographically approved