  Intertwining of different quantum degrees of freedom manifests exotic quantum
phenomena in many-body systems, especially in reduced dimensionality. Here we
show that monolayered NbTe2 serves as an ideal platform where lattice, charge,
and spin degrees of freedom manifest cooperatively, leading to a new and
threading order of chirality. By using spin-polarized scanning tunneling
microscopy/spectroscopy, we reveal that the root19 * root19 phase of NbTe2 is
encoded with both alternating-chiral atomic displacements and charge density
waves, characterized by two chiral units of opposite handedness within the
reconstructed cell. We show unambiguous evidence for emergent spin
polarizations spreading over the primitive cell, with the magnetization
orientation synchronized with alternating handedness of chiral order. Our
first-principles studies identify the origin of intertwined orders being
correlation driven, with the threading order of chirality emerging when the
on-site Coulomb repulsion exceeds a critical value. The spin ordering is
further shown to be of hybrid ferrimagnetic nature, contributed by the
itinerant electrons and localized d-orbitals. Collectively, these findings
expand the realm of chiral order in correlated electron systems, and facilitate
an appealing platform for chiral spintronic and related applications.
