Knobs control Dirac energy in topological insulators

Four different knobs can be used to control the Dirac energy in topological insulators, in this way one can tune the surface electronic structure of 3D TI's. This work is just out in PRB.


Top: the surfaces of all five TI's are n-type after band bending. Bottom: using the illumination 'knob', flat band conditions are restored and the true Fermi level position emerges.

Top: the surfaces of all five TI's are n-type after band bending.
Bottom: using the illumination 'knob', flat band conditions are restored and the true Fermi level position emerges.

 

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