Abstract
On the basis of a simple one-particle model we derived eigenstates and eigenenergies ofelectrons confined in an equilateral triangular quantum dot of InAs (111)A surface.Considering two subbands formed by the band bending in the InAs surface, we explainedSTM images observed in the differential conductance mode. It is pointed out thatcontributions from two subbands are indispensable for analyzing the STM images on theInAs quantum dot. Moreover, it is shown that reduction in the subband energy levelinduced by an applied bias voltage plays an important role in obtaining proper STMimages.
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