Low-energy collective electronic excitations in Pd metal

Physical Review B - Condensed Matter and Materials Physics

Volumn 80, Issue 24, 2009, Pages

  Silkin, V M ^a,b,c,d   Chernov, I P ^d   Koroteev, Yu M ^b,d,e   Chulkov, E V ^a,b  

^a UNIVERSITY OF THE BASQUE COUNTRY UPV EHU   (Spain)

^b DONOSTIA INTERNATIONAL PHYSICS CENTER DIPC   (Spain)

^c BASQUE FOUNDATION FOR SCIENCE   (Spain)

^d NATIONAL RESEARCH TOMSK POLYTECHNIC UNIVERSITY   (Russian Federation)

^e INSTITUTE OF STRENGTH PHYSICS AND MATERIALS SCIENCE   (Russian Federation)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77954717738     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.245114     Document Type: Article

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78. From Fig. and Table it is clear that acoustic plasmons in Pd have too high group velocities to induce any effect on superconductivity in this material. This is because the large value of the group velocity reduces the phase space for virtual transitions involving acoustic plasmons, leading to a small value of the coupling constant for the pairing and to inability to overcome direct static Coulomb repulsion. This is in accord with absence of superconductivity in this metal.