Exchange interaction and stability diagram of coupled quantu(10)

The charge stability diagram for two coupled quantum dots containing up to two electrons is computed in magnetic fields. One- and two-particle Schroedinger equations are solved by exact diagonalization to obtain the chemical potentials and exchange energy

FIGURES

V [meV]x [nm] µ [meV]-10 µ [meV]-15-20

-25

VL=VR [meV]

FIG.1:(Coloronline)(a)Thecon nementpotentialford=50nm(red)andd=60nm(blue)atVL=VR=25meV.Chemicalpotentialsµ(1)(solid)andµS(2)(dashed)vs.VL=VRfor(b)d=50nmand(c)d=60nm.InbothofthemthehorizontallineindicatesthevaluesofthechemicalpotentialatwhichthecontoursinFig.3aredrawn.