Magnetism in artificial lattices

Kimmo Kärkkäinen; Magnus Borgh; M Manninen; Stephanie Reimann

doi:10.1140/epjd/e2007-00098-4

Magnetism in artificial lattices

Kimmo Kärkkäinen, Magnus Borgh, M Manninen, Stephanie Reimann

Mathematical Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	225-228
Journal	European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics
Volume	43
Issue number	1-3
DOIs	https://doi.org/10.1140/epjd/e2007-00098-4
Publication status	Published - 2007

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)

Subject classification (UKÄ)

Physical Sciences

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10.1140/epjd/e2007-00098-4

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AU - Borgh, Magnus

AU - Manninen, M

AU - Reimann, Stephanie

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PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

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JF - European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics

IS - 1-3

ER -

Magnetism in artificial lattices

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