Electron-phonon coupling constant transition metals

Some silicides are superconductors with transition temperatures in a broad range of values [148, 149] and small electron-phonon coupling constants [144], Table 14.3 collects carrier concentrations for thin silidde films evaluated from Hall effect measurements. Most metallic silicides present both electrons and holes in approximately equal number and having the same characteristics, that is, mobility and carrier density. This behavior is traced back to the existence of two bands, one electron-Uke and one hole-hke, crossing the Fermi energy [150]. 

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