Yet, despite the successful transition from 3D to 2D, the barrier separating 2D and 1D has been significantly more challenging to overcome. ... (TMMs, transition metal + group 16 element) ...

They also observed the crossover from 1D Fermi arc edge states to the 2D Fermi arc surface states on ... and (114) have been never investigated. Here is a 3D topographic STM image containing ...