We show that when a honeycomb antiferromagnetic insulator (AFMI) is sandwiched between two transition-metal dichalcogenide (TMD) monolayers, magnons in the AFMI can mediate an interaction between electrons in the TMDs that gives rise to interlayer Cooper pairing. This interaction opens coexisting extended $s$-wave and chiral $p$-wave superconducting gaps in the energy spectrum of the coupled system. The latter gives rise to topological Majorana edge modes. The mechanism we propose therefore provides a path to realize an intriguing type of topological interlayer pairing in a class of van der Waals heterostructures.

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• Magnons
• Spin fluctuations
• Spin-orbit coupling
• Topological materials
• Transition metal dichalcogenides
• Superconductivity