Aharonov-Bohm effect under high magnetic field in a Corbino disk anti-dot channel

Abstract

Corbino disk anti-dots are fabricated by distributing several thousand sub-microm square holes throughout a square Corbino disk channel. The magnetoresistance (magnetoconductance) or Corbino disk anti-dots up to 10 T displays a periodic oscillation over the entire magnetic field at temperatures below 0.1 K. Since Corbino disk anti-dots prevent electrons from flowing along an edge, electrons go around the shallow etched holes under a high magnetic field. The periodic oscillation comes from the Aharonov-Bohm (A-B) effect, which is the electron wave interference of electron trajectories encircling the magnetic flux which penetrates through the shallow-etched hole.