Abstract
A one-dimensional Kohn-Sham system for spin particles is considered which effectively describes semiconductor nanostructures, and which is investigated at zero temperature. We prove the existence of solutions and derive a priori estimates. For this purpose we find estimates for eigenvalues of the Schrödinger operator with effective Kohn-Sham potential and obtain W1,2-bounds of the associated particle density operator. Afterwards, compactness and continuity results allow us to apply Schauder's fixed point theorem. In the case of vanishing exchange-correlation potential uniqueness is shown by monotonicity arguments. Finally, we investigate the behavior of the system if the temperature approaches zero.
Original language | English |
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Journal | Journal of Physics A: Mathematical and Theoretical (Print Edition) |
Volume | 41 |
Issue number | 38 |
Number of pages | 21 |
ISSN | 1751-8113 |
DOIs | |
Publication status | Published - 2008 |