Theoretical investigation of thermostability of incompressible channels in quantum Hall states

• We model the thermostability of incompressible channels in quantum Hall states.
• The thermo decay of incompressible stripes depends highly on the geometry of them.
• A bulk strip will decay into two edge strips from the middle by a density ramp.
• An edge strip will reduce its size from both sides until vanishes.

In this work we use self-consistent method considering a two dimensional electron gas system in the integer quantum Hall regime, to calculate the temperature induced decay of incompressible stripes. There are two types of incompressible strips which can form in a Hall bar system by varying the electron density or magnetic field. We observe that the way of collapse of incompressible strips strongly depends on the type of them. With increasing temperature a bulk incompressible strip will decay from the middle and separate into two edge channels by a density ramp, while an incompressible edge channel reduces its size from both sides until vanishes.

The different decay mechanisms of the incompressible bulk channel and edge channels in quantum Hall states with increasing temperature are studied.Figure optionsDownload as PowerPoint slide