Scanning tunneling spectroscopy of layers of superconducting   2H-TaSe$_\textbf{2}$: Evidence for a zero bias anomaly in single layers
  We report a characterization of surfaces of the dichalcogenide TaSe$_2$ using scanning tunneling microscopy and spectroscopy (STM/S) at 150 mK. When the top layer has the 2H structure and the layer immediately below the 1T structure, we find a singular spatial dependence of the tunneling conductance below 1 K, changing from a zero bias peak on top of Se atoms to a gap in between Se atoms. The zero bias peak is additionally modulated by the commensurate $3a_0 \times 3a_0$ charge density wave of 2H-TaSe$_2$. Multilayers of 2H-TaSe$_2$ show a spatially homogeneous superconducting gap with a critical temperature also of 1 K. We discuss possible origins for the peculiar tunneling conductance in single layers. 
J. A. Galvis, P. Rodi\`ere, I. Guillam\'on, M. R. Osorio, J. G.   Rodrigo, L. Cario, E. Navarro-Moratalla, E. Coronado, S. V...
cond-mat.supr-con