  The complex correlated charge density wave (CDW) phases of 1T-TaS2 have
attracted great attention due to their emergent quantum states, such as
intricate CDW phase, Mott-Hubbard state, superconductivity and quantum spin
liquid. The delicate interplay among the complex intra-/inter-layer
electron-electron and electron-lattice interactions is the fundamental
prerequisite of these exotic quantum states. Here, we report a real-space
titration-like investigation of correlated CDW state in 1T-TaS2 upon
hole-doping via low-temperature scanning tunneling microscopy (LT-STM). The
gradual increased hole-doping results in the sequential emergence of electron
voids, phase domains, stacking disordering and mixed phase/chiral domains
attributed to the reduced electron correlations. The achiral intermediate
ring-like clusters and nematic CDW states emerge at the intralayer chiral
domain wall and interlayer heterochiral stacking regions via the
chiral-overlapping configurations. The local reversible CDW manipulation is
further realized by the non-equilibrium transient charge-injections of STM
field-emission spectra. Our results provide an in-depth insight of this
intricate correlated CDW state, and pave a way to realize exotic quantum states
via the accurate tuning of interior interactions in correlated materials.
