Title: Rashba and Ising superconductors


Time-reversal and parity are key symmetries in BCS theory. After introducing the basics of unconventional superconductivity, I will present the superconducting states that emerge when parity and time-reversal lack. Two systems will be discussed: a Rashba and an Ising superconductor. The Rashba system is a few-layer superconductor where spin-orbit coupling locks the spins in the in-plane direction with a helical structure. An unconventional superconducting state called a “pair-density wave” emerges at high magnetic fields perpendicular to the layers. The Ising system is a monolayer transition metal dichalcogenide. In contrast to the Rashba case, the particular form of the crystal field locks the spins perpendicularly to the basal plane, making superconductivity robust against in-plane magnetic fields. We characterize the intrinsically parity-mixed superconducting state in real space and investigate how it responds to scalar impurities. 



https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.144508  
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.144518