Invited Paper SP+SS+TF-WeM1
Local Probe Investigation of 1D Structures and Interfaces in 2D Materials

Wednesday, November 9, 2016, 8:00 am, Room 104A

Emerging two-dimensional (2D) materials, such as graphene and atomically thin transition metal dichalcogenides, have been the subject of intense research efforts for their fascinating properties and potential applications in future electronic and optical devices. The interfaces in these 2D materials, including domain boundaries and edges, strongly govern the electronic and magnetic behavior and can potentially host new quantum states. On the other hand, these interfaces are more susceptible to thermal fluctuation and external stimuli that drive mass displacement and generate disorder. In this talk we will present our scanning tunneling microscopy (STM) and spectroscopy (STS) explorations of edges of few layered molybdenum disulfide (MoS₂) nanostructures with unique structural and electronic properties and show how step edges on titanium diselenide (TiSe₂) surfaces change dynamically due to electrical fields. We will also discuss temperature evolution of quasi-1D C₆₀ nanostructures on graphene. Through careful control of the subtle balance between the C₆₀ surface mobility and the linear periodic potential of rippled graphene, C₆₀ molecules can be arranged into a novel 1D C₆₀ chain structure, and this chain structure can further transition to a compact hexagonal close packed stripe structure by tuning the annealing temperature.