Abstract
We present temperature dependent scanning tunneling spectroscopy data of the quasi-one-dimensional conductor . The differential tunneling current in our low-temperature spectra shows a power-law behavior around the Fermi energy, which is expected for a clean Luttinger liquid. The power-law exponent is found to be 0.6. Spectra for a temperature range of 5 to 55 K can be fitted fairly well with a model for tunneling into a Luttinger liquid at the appropriate temperature. A fit with a model based on a zero bias anomaly is significantly worse compared to the Luttinger liquid model. No signature of a phase transition at is observed in our temperature dependent data.
- Received 15 April 2005
DOI:https://doi.org/10.1103/PhysRevLett.95.186402
©2005 American Physical Society