Abstract
We report on the temperature dependence of the magnetoresistance in a twodimensional
electron gas subjected to an abrupt magnetic field gradient. The gradient leads to
the formation of snake states and cycloid states that drift perpendicular to it. By studying
changes in the magnetoresistance in the temperature range 1-40K we show significantly
different behaviour for these two types of magnetic orbit. Snake states have a robust
temperature dependence because of their vanishingly small period whereas cycloid states have
a similar period to closed cyclotron orbits. This interpretation is supported by a drift diffusion
model comparing the elastic scattering time to the period of both orbits. The Shubnikov-de
Haas oscillations are also studied and exhibit a decline over the same temperature range as the
cycloid states whilst the snake states remain largely unaffected.
Original language | English |
---|---|
Journal | Semimag-15 Proceedings |
Publication status | Published - 2002 |