High Magnetic Field Superconductivity in a Transition Metal Dichalcogenide Superlattice

Superconductivity rarely survives to high magnetic field, which nucleates vortices and breaks the time-reversal symmetry necessary for the formation of conventional Cooper pairs. Here we present the design and synthesis of natural superlattice materials which combine superconducting transition metal dichalcogenide layers and insulating spacer layers to overcome conventional limits for superconductivity. In particular, we show how superlattice structures based on H-TaS₂ monolayers can overcome conventional orbital and Pauli limiting behaviors, driven by increased interlayer spacing and electronic reconstruction of the conducting layers. We discuss how high electronic mobility of these systems supports unconventional, high field superconducting states.