μSR studies of intercalated HfNCl superconductor

Muon spin relaxation measurements of the magnetic field penetration depth λ have been performed in a quasi two-dimensional (2-d) superconductor based on HfNCl intercalated with Li and organic molecules. The relaxation rate σ(T→0)∼0.5μs−1 was obtained with transverse fields applied perpendicular to the aligned HfN planes. Using the relation σ∝λ−2∝ns2d/m∗ (2-d superconducting carrier density/effective mass), we deduced the 2-d Fermi temperature …