Two-dimensional nature of superconductivity in the intercalated layered systems LixHfNCl and LixZrNCl: Muon spin relaxation and magnetization measurements

We report muon spin relaxation (μSR) and magnetization measurements, together with synthesis and characterization, of the Li-intercalated layered superconductors LixHfNCl and LixZrNCl with/without cointercalation of THF (tetrahydrofuran) or propylene carbonate. The three-dimensional superfluid density ns/m* (superconducting carrier density/effective mass) as well as the two-dimensional superfluid density ns2D/mab* [two-dimensional (2D) area …