Session 4-1

Abstract

Semiconducting transition metal dichalcogenides host a range of quantum phenomena, including two-dimensional superconductivity in electric double-layer transistors that exceeds the Pauli limit [1], display Josephson coupled states [2], and high-mobility electronic states in the conduction band [3]. Yet, the microscopic origin of the dome-shaped superconducting phase diagram in MoS₂ remains unresolved. High-field quantum oscillation experiments now provide in-depth details of the Fermi surface, showing that spin-splitting at K and K’ valleys persist well inside the superconducting dome, accompanied by the emergence of pronounced Q – pocket. These results demonstrate the multivalley nature of the electronic structure and provide insights into phonon-driven inter-valley interactions as a central ingredient in the superconductivity of MoS₂.