Phys. Rev. Lett. 94, 236804 (2005) [4 pages]Microscopic Dielectric Response Functions in Semiconductor Quantum DotsReceived 10 January 2005; published 15 June 2005 We calculate and model the microscopic dielectric response function for quantum dots using first principle methods. We find that the response is bulklike inside the quantum dots, and the reduction of the macroscopic dielectric constants is a surface effect. We present a model for the microscopic dielectric function which reproduces well the directly calculated results and can be used to solve the Poisson equation in a nanosystem. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.236804
DOI:
10.1103/PhysRevLett.94.236804
PACS:
73.22.-f, 73.21.-b
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