  Two-dimensional layered transition-metal-dichalcogenide compound 1T-TaS2
shows the rare coexistence of charge density wave (CDW) and electron
correlation driven Mott transition. In addition, atomic-cluster spins on the
triangular lattice of the CDW state of 1T-TaS2 give rise to the possibility of
the exotic spin-singlet state in which quantum fluctuations of spins are strong
enough to prevent any long range magnetic ordering down to absolute zero ( 0
K). We present here the evidences of a glass-like random singlet magnetic state
in 1T-TaS2 at low temperatures through a study of temperature and time
dependence of magnetization. Comparing the experimental results with a
representative canonical spin-glass system Au(1.8%Mn), we show that this
glass-like state is distinctly different from the well established canonical
spin-glass state.
