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Canted phase in double quantum dots
Physical Review B (Condensed Matter)
We perform a Hartree-Fock calculation in order to describe the ground state of a vertical double quantum dot in the absence of magnetic fields parallel to the growth direction. Intra- and interdot exchange interactions determine the singlet or triplet character of the system as the tunneling is tuned. At finite Zeeman splittings due to in-plane magnetic fields, we observe the continuous quantum phase transition from ferromagnetic to symmetric phase through a canted antiferromagnetic state. Thedoi:10.1103/physrevb.64.235304 fatcat:ufp42nn3fzen5jlej7arikz6k4