Abstract

We present a framework for analyzing upper critical in-plane magnetic field data in multilayer superconductors. Using an analytically tractable superconducting pairing model that captures the normal-state phenomenology of quasi-2D layered systems, we calculate the relationship between the upper critical field Hc₂ and the critical temperature Tc as a function of Ising and Rashba spin-orbit coupling and Zeeman and orbital depairing for spin-singlet and spin-triplet pairing. Applying the framework to four recent Bernal bilayer graphene-WSe₂ experiments, we identify an apparent discrepancy between fitted and measured spin-orbit parameters, which we propose can be explained by an enhanced Landé g factor.

Abstract

We present a framework for analyzing upper critical in-plane magnetic field data in multilayer superconductors. Using an analytically tractable superconducting pairing model that captures the normal-state phenomenology of quasi-2D layered systems, we calculate the relationship between the upper critical field Hc₂ and the critical temperature Tc as a function of Ising and Rashba spin-orbit coupling and Zeeman and orbital depairing for spin-singlet and spin-triplet pairing. Applying the framework to four recent Bernal bilayer graphene-WSe₂ experiments, we identify an apparent discrepancy between fitted and measured spin-orbit parameters, which we propose can be explained by an enhanced Landé g factor.

Abstract

We present a framework for analyzing upper critical in-plane magnetic field data in multilayer superconductors. Using an analytically tractable superconducting pairing model that captures the normal-state phenomenology of quasi-2D layered systems, we calculate the relationship between the upper critical field Hc₂ and the critical temperature Tc as a function of Ising and Rashba spin-orbit coupling and Zeeman and orbital depairing for spin-singlet and spin-triplet pairing. Applying the framework to four recent Bernal bilayer graphene-WSe₂ experiments, we identify an apparent discrepancy between fitted and measured spin-orbit parameters, which we propose can be explained by an enhanced Landé g factor.

Abstract

We present a framework for analyzing upper critical in-plane magnetic field data in multilayer superconductors. Using an analytically tractable superconducting pairing model that captures the normal-state phenomenology of quasi-2D layered systems, we calculate the relationship between the upper critical field Hc₂ and the critical temperature Tc as a function of Ising and Rashba spin-orbit coupling and Zeeman and orbital depairing for spin-singlet and spin-triplet pairing. Applying the framework to four recent Bernal bilayer graphene-WSe₂ experiments, we identify an apparent discrepancy between fitted and measured spin-orbit parameters, which we propose can be explained by an enhanced Landé g factor.