  1T-tantalum disulphide (1T-TaS2) is a promising material to realize quantum
spin liquid state and fractional excitations. Here, we take a closer look on
the temperature dependent magnetic susceptibility of 1T-TaS2 at low magnetic
fields to understand the formation of local magnetic moment in this system and
its response as a function of temperature and field. We found that the
susceptibility increases with reduction in the temperature even in the nearly
commensurate charge density wave (CDW) phase, which exhibits metallic
conductivity and hence is expected to exhibit temperature independent Pauli
paramagnetic susceptibility. Therefore, it indicates that local moment starts
forming in the nearly commensurate CDW phase itself, which is well above the
temperature where the evidence of Mott insulating state is found in resistivity
measurement. In the commensurate CDW phase, temperature dependence of
susceptibility significantly deviates from the Curie-Weiss law and does not
show the magnetic properties expected from S = 1/2 spin on a two dimensional
triangular lattice. Below T = 10 K, susceptibility follows a power law
dependence on the temperature, which indicates towards the formation of random
singlet state in 1T-TaS2.
