Super Bloch oscillations in the Peyrard-Bishop-Holstein model

Details Super Bloch oscillations in the Peyrard-Bishop-Holstein model Super Bloch oscillations in the Peyrard-Bishop-Holstein model

2011-10-20

arxiv.org/abs/1110.4470v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Recently, polarons in the Peyrard-Bishop-Holstein model under DC electric fields were established to perform Bloch oscillations, provided the charge-lattice coupling is not large. In this work, we study this model when the charge is subjected to an applied field with both DC and AC components. Similarly to what happens in the rigid lattice, we find that the carrier undergoes a directed motion or coherent oscillations when the AC field is resonant or detuned with respect to the Bloch frequency, respectively. The electric density current and its Fourier spectrum are also studied to reveal the frequencies involved in the polaron dynamics.

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