Magnetism in artificial lattices

K. Kärkkäinen, M. Borgh, M. Manninen, S. M. Reimann

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2 Citations (Scopus)


We compare magnetism in two artificial lattice structures, a quantum dot array formed in a two-dimensional electron gas and an optical lattice loaded with repulsive, contact-interacting fermionic atoms. When the tunneling between the lattice sites is strong, both lattices are non-magnetic. With reduced tunneling in the tight-binding limit, the shell-filling of the single-site quantum wells combined with Hund's rule determines the magnetism. This leads to a systematic magnetic phase diagram with non-magnetic, ferromagnetic and antiferromagnetic phases.

Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalEuropean Physical Journal D
Issue number1-3
Publication statusPublished - Jul 2007

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