Sn doping creates 3D Fermi pockets in PbTaSe2 that open a second superconducting gap and raise Tc to 5.1 K.
This yields the superconducting gap ampli- tude 2∆0/kBTc = 2 .9 for x = 0 .08 and 2∆0/kBTc = 3 .3 for x = 0 .15, both of which are smaller than the BCS weak-coupling value of 3.53
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Enhancement of the superconducting transition temperature due to multiband effect in the topological nodal-line semimetal Pb$_{1-x}$Sn$_{x}$TaSe$_{2}$
Sn doping creates 3D Fermi pockets in PbTaSe2 that open a second superconducting gap and raise Tc to 5.1 K.