Spatial distribution of local density of states in vicinity of impurity on semiconductor surface |
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Authors: | V N Mantsevich and N S Maslova |
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Institution: | (1) Department of Physics, Moscow State University, Moscow, 119991, Russia |
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Abstract: | We present the results of detailed theoretical investigations of changes in local density of total electronic surface states
in 2D anisotropic atomic semiconductor lattice in vicinity of impurity atom for a wide range of applied bias voltage. We have
found that taking into account changes in density of continuous spectrum states leads to the formation of a downfall at the
particular value of applied voltage when we are interested in the density of states above the impurity atom or even to a series
of downfalls for the fixed value of the distance from the impurity. The behaviour of local density of states with increasing
of the distance from impurity along the chain differs from behaviour in the direction perpendicular to the chain.
The article is published in the original. |
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