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Layered platinum tellurium (PtTe2) was recently synthesized with controllablelayer numbers down to a monolayer limit. Using ab initio calculations based onanisotropic Midgal-Eliashberg formalism, we show that by rubidium (Rb)intercalation, weak superconductivity in bilayer PtTe2 can be significantlyboosted with superconducting Tc = 8 K in the presence of spin-orbit coupling(SOC). The intercalant on one hand mediates the interlayer coupling and servesas an electron donor, leading to large density of states at Fermi energy. Onthe other hand, it increases the mass-enhancement parameter withelectron-phonon coupling strength comparable to that of Pt. The potassiumintercalated bilayer PtTe2 has a comparable Tc to the case of Rb intercalation.The relatively high Tc with SOC combined with experimental accessible crystalstructures suggest that these superconductors are promising platforms to studythe novel quantum physics associated with two-dimensional superconductivity,such as the recently proposed type-II Ising superconductivity.

Enhanced superconductivity in bilayer PtTe$_2$ by alkali-metal intercalations