Fig. 3: The uniaxial-insulating behavior and band structure of (NaOH)0.5NbSe2.

a The temperature-dependent in-plane and out-plane resistivity measured for NbSe2 and (NaOH)0.5NbSe2 between 3 and 300 K. b The band structures and Fermi surfaces of (NaOH)0.5NbSe2, bulk, and monolayer NbSe2. The size of the circles is proportional to the contribution of NbSe2.