This is a special High Pressure Cell made from non-magnetic materials
at the High Pressure Laboratory, Troitsk, Moscow. It has electrical
connections and optical fibre inputs which allow us to make electrical
transport and optical measurements at pressures up to 25,000 Atmospheres
at temperatures down to 300mK in magnetic fields up to 21.5T.
It is currently being used to study the two dimensional electron
system in GaAs/GaAlAs heterojunctions where the high pressure
allows the Zeeman splitting (electron g-factor) to be tuned through
zero in order to generate new spin textured states of matter.
