Non-Fermi-Liquid Behavior in Gold Nanowires on Ge(001)

In the recently discovered self-organized Au atomic nanowires on Ge(001) a power-law behavior in the density of states (DOS) has been discovered by low-temperature scanning tunneling spectroscopy (STS). We present temperature dependent STS data in a temperature range from T = 5K to T = 50K that show energy and temperature dependence as expected for Luttinger-liquids. The structure of the system has been studied by low-temperature scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). A subtle four-fold periodicity along the chains is found, lacking lateral phase correlation. An energy gap relating to a charge density wave is not observed.