【摘 要】
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We investigate the impurity effects on surfaces of a thin film topological insulator,applied by an off-resonant circular polarized light.It is found that the of
【机 构】
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National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Na
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We investigate the impurity effects on surfaces of a thin film topological insulator,applied by an off-resonant circular polarized light.It is found that the off-resonant driving induces a quantized total Hall conductivity,when the driving strength is larger than a critical value and the Fermi level lies in the band gap,indicating that our system is converted into the topological phase.We also find that with the increasing disorder strength,the Dirac masses of top and bottom surfaces are renormalized and then fixed to half of their initial values,respectively,which will shrink the widths of the half-integer plateau of anomalous Hall conductivities.
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