Techniques are described for growing single crystals ofthe transition metal dichalcogenide compounds Nb1 — ~Ta~Se2(0 ~ x ~ 0.20). Both iodine and selenium vapor transport have been used. A portion of the phase diagram has been determined, in order to produce the desired 2H polymorpoh for all compositions of interest. Measurement of the superconducting transition temperature is shown to be a use...

The performance of electronic and optoelectronic devices based on two-dimensional layered crystals, including graphene, semiconductors of the transition metal dichalcogenide family such as molybdenum disulphide (MoS2) and tungsten diselenide (WSe2), as well as other emerging two-dimensional semiconductors such as atomically thin black phosphorus, is significantly affected by the electrical cont...

Abstract Lubrication induced by a vertical electric field or bias voltage is typically not applicable to two-dimensional (2D) van der Waals (vdW) crystals. By performing extensive first-principles calculations, we reveal that the interlayer friction and shear resistance of Janus transition metal dichalcogenide (TMD) MoXY (X/Y = S, Se, Te, X ≠ Y) bilayers under constant normal force mode can be ...

Abstract The coexistence of multiple ferroic orders, i.e., multiferroicity, is a scarce property to be found in materials. Historically, this state has been mainly 3-dimensional complex oxides, but so far, still elusive for the most widely studied and characterized family 2-dimensional compounds, transition metal dichalcogenides. In study, we report experimental realization multiferroic states ...