Figure 2
From: Emergence of superconductivity in (NH3)yMxMoSe2 (M: Li, Na and K)
(a) M/H vs. T plots of the (NH3)yNa0.5MoSe2 agglomerations in ZFC and FC modes (H = 10 Oe). Inset in (a) shows the method used to determine Tc. (b) M – H curve measured at 2 K for the (NH3)yNa0.5MoSe2 agglomerations. In the inset of (b), the expanded M – H curve is shown together with the fitted line. The chemical composition of (NH3)yNa0.5MoSe2 used in (a,b) was determined to be (NH3)0.4(1)Na0.41(1)MoSe2.04(1) (see text). (c) x-dependence of Tc and Tconset in (NH3)yNaxMoSe2; x was evaluated from the EDX. In (c) the shielding fraction is evaluated using the ρ determined using each chemical stoichiometry for (NH3)yNaxMoSe2; y is assumed to be 0.4. The inset of (c) shows how to determine the Tc and Tconset.
