Wilson chains are not thermal reservoirs |
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Authors: | A Rosch |
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Institution: | 1.Institute for Theoretical Physics,University of Cologne,Cologne,Germany |
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Abstract: | The effects of transverse electric field on the electronic structures, exciton states
and excitonic absorption spectra in a cylindrical quantum wire are theoretically
investigated in detail. The quantum wire is assumed to GaAs material surrounded by the
infinite potential barrier. The results show that the external electric field removes the
degeneracy of the electron or hole states. The energy levels of electron and hole, exciton
binding energy, excitonic absorption coefficient and absorption energy decrease with
increasing the strength of the electric field or the wire radius. The effects of the
electric field become more significant for wide wires. The phenomena can be explained by
the reduced spatial overlap of ground electron and hole states. |
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Keywords: | |
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