Nanoelectrical devices become increasingly important. However, it is a little-known fact that the outermost layer of insulators can show metallic conductivity. Researchers of the Chinese Academy of Sciences are investigating these material properties. They grew monolayer crystals like MoS₂ and WSe₂ on HOPG (highly oriented pryolytic graphite). At temperatures below 50 K, they were able to demonstrate non-ohmic charge transports which can be explained with the Luttinger liquid. A Lake Shore Probe Station was used for the electrical measurements. The versatile system can easily be adapted to fit specific applica­tions like high-sensitivity electrical measurements. With help of a bias current on the sample holder and the use of several probes, the researchers were able to measure a voltage drop between six different contacts at up to 6.3 K.

Features:

• Base temperature to 1.6 K
• Magnetic field to 2.5 T
• Cryogen-free designs

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