Charge transports in insulator edges

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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