Publications [#234965] of Weitao Yang

Journal Articles
  1. Jiang, H; Ullmo, D; Yang, W; Baranger, HU, Scrambling and gate-induced fluctuations in realistic quantum dots, Physical Review B, vol. 71 no. 8 (2005) [doi] .

    We evaluate the magnitude of two important mesoscopic effects using a realistic model of typical quantum dots. "Scrambling" and "gate effect" are defined as the change in the single-particle spectrum due to added electrons or gate-induced shape deformation, respectively. These two effects are investigated systematically in both the 'self-consistent Kohn-Sham (KS) theory and a Fermi liquidlike Strutinsky approach. We find that the genuine scrambling effect is small because the potential here is smooth. In the KS theory, a key point is the implicit inclusion of residual interactions in the spectrum; these dominate and make scrambling appear larger. Finally, the gate effect is comparable in the two cases and, while small, is able to cause gate-induced spin transitions. ©2005 The American Physical Society.