Tunneling conductivity features of the new reconstructed phases on the GaN (0001) surface

Two new Au-induced reconstructed phases on the GaN (0001) surface have been found out and investigated by STM/STS method. Ring-like and c(2$\times$12) surface nanostructures were observed on STM images. The commensurate c(2$\times$12) structure ($\alpha$-phase) according to our spectroscopic measurements demonstrates properties of 1D system whereas the incommensurate $\beta$-phase looks similar to disordered 2D system.