High‐quality one‐dimensional electron wave guides were fabricated by atomic‐force microscope lithography from a AlGaAs/GaAs 30 nm wide quantum well with two occupied subband. In the case of strong coupling the quantized conductance at 4.2 K shows missing or ill‐defined steps with otherwise regular increase in multiples of 2e2/h which are caused by coincidence of 1D subbands of different vertical modes. Magnetotransport in transverse fields show nearly regular patterns of level crossings and anticrossings.
This content is only available via PDF.
© 2005 American Institute of Physics.
2005
American Institute of Physics
You do not currently have access to this content.
