New Luttinger liquid physics from photoemission on Li$_{0.9}$Mo$_6$O$_{17}$

Wang, Feng; Alvarez, J. V.; Mo, S. -K.; Allen, J. W.; Gweon, G. -H.; He, J.; Jin, R.; Mandrus, D.; Höchst, H.

New Luttinger liquid physics from photoemission on Li$_{0.9}$Mo$_6$O$_{17}$

Authors

Description

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.
4 pages, 3 figures. Accepted for publication by Phys. Rev. Lett