@inproceedings{32c1432e2ddb4fde864cb3007f4ce844,

title = "Spin configurations in vertical quantum dots in magnetic fields: Three-dimensional self-consistent simulation",

abstract = "The magnetic field dependence of the electronic properties of real single vertical quantum dots in circular and rectangular mesas is investigated within a full three-dimensional multiscale self-consistent approach without any {\'a} priori assumptions about the shape and strength of the confinement potential. Charging diagrams in a magnetic field for number of electrons up to five are also computed. Consistent with the experimental data, we found that the charging curves for the rectangular mesa dot in a magnetic field are flatter and exhibit less features than for a circular mesa dot. Evolution of the singlet-triplet energy separation in the two electron system for both dot geometries in magnetic field was also investigated. In the limit of large magnetic field, beyond the singlet-triplet transition, the singlet-triplet energy difference continues to become more negative in a circular mesa dot without any saturation whilst it is predicted to asymptotically approach zero for the rectangular mesa dot. This different behavior is attributed to the symmetry {"}breaking{"} that occurs in the singlet wave-functions in the rectangular dot.",

keywords = "Density - functional theory, Quantum dots, Simulations",

author = "Melnikov, {D. V.} and Leburton, {J. P.} and Austing, {D. G.}",

year = "2005",

doi = "10.1109/NANO.2005.1500699",

language = "English (US)",

isbn = "0780391993",

series = "2005 5th IEEE Conference on Nanotechnology",

pages = "253--256",

booktitle = "2005 5th IEEE Conference on Nanotechnology",

note = "2005 5th IEEE Conference on Nanotechnology ; Conference date: 11-07-2005 Through 15-07-2005",

}