Superconductivity in PdH: phenomenological explanation

✍ Scribed by Paolo Tripodi; Daniele Di Gioacchino; Jenny Darja Vinko

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 270 KB
• Volume: 408-410
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2004.02.099

✦ Synopsis

Experimental data on PdH x (D) at 300 K shows electrical resistivity q lower than that of the pure Pd for stoichiometry x ¼ H =Pd close to the unit. At this stoichiometric value x ¼ 1 a T c of 9 K and higher T c for x > 1 have been measured. In these systems T c increases with stoichiometry x, hence a phenomenological description of the q for highly loaded PdH(D) system at 300 K has been developed. This approach uses a parallel model of two concurrent electrical transport processes: (i) q has a linear raise with the x, due to the increase of Pd lattice relative volume, (ii) q has an exponential decrease versus x due to superconducting fluctuations at very high x in PdH(D). Under the assumption of our model, PdH x could be considered as a possible room temperature superconductor. Inverse isotopic effect for 0:6 > x > 0:96 changes to normal isotopic effect at stoichiometry x W > 1.