New Luttinger-liquid physics from photoemission on Li0.9M06O17

Phys Rev Lett. 2006 May 19;96(19):196403. doi: 10.1103/PhysRevLett.96.196403. Epub 2006 May 16.


Temperature dependent high resolution photoemission spectra of quasi-one-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.