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RESEARCH PRODUCT
Spin and rotational symmetries in unrestricted Hartree–Fock states of quantum dots
Fabio CavaliereR. CenniU. De GiovanniniBernhard KramerBernhard KramerMaura Sassettisubject
PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsMAGNETIC-FIELDARTIFICIAL ATOMSFOS: Physical sciencesGeneral Physics and AstronomyUnrestricted Hartree–Fockquantum dotsElectronINTERACTING ELECTRONSQuantum numberSettore FIS/03 - Fisica Della MateriaMagnetic fieldDIFFUSION MONTE-CARLOQuantum dotQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Homogeneous spaceMANY-PARTICLE SYSTEMSGround stateSpin-½description
Ground state energies are obtained using the unrestricted Hartree Fock method for up to four interacting electrons parabolically confined in a quantum dot subject to a magnetic field. Restoring spin and rotational symmetries we recover Hund first rule. With increasing magnetic field, crossovers between ground states with different quantum numbers are found for fixed electron number that are not reproduced by the unrestricted Hartree Fock approximation. These are consistent with the ones obtained with more refined techniques. We confirm the presence of a spin blockade due to a spin mismatch in the ground states of three and four electrons.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-04-12 | New Journal of Physics |