Dynamically-created Josephson Junctions in thin layers of NbSe2

Niobium Diselenide (NbSe2) is a member of the transition metal dichalcogenides (TMDs) family which displays superconducting properties and is host to charge density waves (CDWs) down to its monolayer limit. These properties as well as its hexagonal structure make it an interesting material to study physics within the two dimensional limit. Here, we report on fabrication and low-temperature transport measurements of atomically-thin layers of NbSe2 in four terminal-configurations. We observe the formation of phase slip lines across our NbSe2 sheets which appear as non-zero resistances in the superconducting state. The formation of the phase slip lines dynamically creates Josephson junctions (JJs) within our devices which we are able to interact with. We interact with these dynamically-created JJs through the application of RF radiation and magnetic fields. Interestingly, we observe a deviation from the conventional behavior of JJs in the presence of RF radiation and a skewed Fraunhofer pattern in the presence of a magnetic field. We attempt to model our observations in the presence of RF by assuming a coupling of the JJ to a CDW.