  Materials where the electron filling is close to commensurate filling provide
one of the great challenges in materials science. Several proposals of
unconventional orderings, where the electronic liquid self-organizes into
components with distinct properties, were recently put forward, in particular
in cuprates and pnictides where electronic nematic orders have been observed.
The electrons self-organization is expected to yield complex intra and inter
unit cell patterns, and a reduction of dimensionality. Nevertheless, an
unambiguous experimental proof of such complex orders, namely the direct
observation of distinct dispersions, is still missing. Here we report a Nano
Angle Resolved Photo-emission Spectroscopy (Nano-ARPES) study of NbSe$_3$, a
material that has been considered a paradigm of charge order. The new data
(Fig.1) invalidate the canonical picture of imperfect nesting and reveals the
emergence of a novel order. The electrons self-organization uncovers the
one-dimensional (1D) physics hidden in a material which naively should be the
most 3D of all columnar chalcogenides.
