Fig. a. Contact pads were made by photolithography
then e-beam lithography was used to make mesa structure (rings)
with 2DEG and finally by again e-beam lithography metal contacts
were produced |
Fig. b. A superconducting ring with a weak point
is placed on the top of heterostructure with 2D electron gas to
investigate dynamics of penetration of single magnetic fluxes in
the ring. |