Possible observation of a Luttinger-liquid behaviour from photoemission spectroscopy of one-dimensional organic conductors

摘要: High-resolution photoemission experiments have been carried out on one-dimensional organic conductors in their normal state. In contrast to usual metals, the spectral function vanishes at Fermi level and no edge is detectable. These results are consistent with a Luttinger description an exponent α of larger than 1 found. This result corroborates recent nuclear-magnetic-resonance experiments. Such large correlation shows that 1D Hubbard model not appropriate strong long-range interactions must be assumed play important role these materials. The compatibility other functions discussed.