New Luttinger liquid physics from photoemission on   Li$_{0.9}$Mo$_6$O$_{17}$
  Temperature dependent high resolution photoemission spectra of quasi-1 dimensional Li$_{0.9}$Mo$_6$O$_{17}$ evince a strong renormalization of its Luttinger liquid density-of-states anomalous exponent. We trace this new effect to interacting charge neutral critical modes that emerge naturally from the two-band nature of the material. Li$_{0.9}$Mo$_6$O$_{17}$ is shown thereby to be a paradigm material that is capable of revealing new Luttinger physics. 
Feng Wang, J.V. Alvarez, S.-K. Mo, J.W. Allen, G.-H. Gweon, J. He, R.   Jin, D. Mandrus, H. H\"ochst