  We show that geometric frustration and strong correlation in the triangular
lattice Hubbard model lead a rich and novel phase structure of
$\sqrt{3}\times\sqrt{3}$ spin-charge textured electronic states over a wide
region of electron doping $0\le x \le 0.40$. In addition to the 120$^\circ$
N\'eel ordered insulator at half-filling, we found a novel spin-charge ordered
insulator at $x=1/3$ with collinear antiferromagnetic (AF) order on the
underlying unfrustrated honeycomb lattice. Separating the two insulating phases
is a Lifshitz transition between a noncollinear AF ordered metal and one with
coexisting charge order. We obtain the phase diagram and the evolution of the
Fermi surface (FS). Remarkably, the correlated ground states near $x=1/3$
emerges as doping the "1/3 AF insulator" by excess carriers, leading to
electron and hole FS pockets with important implications for the cobaltate
superconducting state.
