Magnetism in artificial lattices
Magnetism in artificial lattices
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.
225-228
Kärkkäinen, K.
7285f0df-8b7a-4124-b995-69c9002ecd19
Borgh, M.
a3c181f8-0535-46cd-bb9a-6e930a81f86e
Manninen, M.
fd5106ea-6562-4c78-a65a-63f64c198fcb
Reimann, S. M.
8319a40d-552d-41f8-af7c-4674e9e4eb86
2007
Kärkkäinen, K.
7285f0df-8b7a-4124-b995-69c9002ecd19
Borgh, M.
a3c181f8-0535-46cd-bb9a-6e930a81f86e
Manninen, M.
fd5106ea-6562-4c78-a65a-63f64c198fcb
Reimann, S. M.
8319a40d-552d-41f8-af7c-4674e9e4eb86
Kärkkäinen, K., Borgh, M., Manninen, M. and Reimann, S. M.
(2007)
Magnetism in artificial lattices.
The European Physical Journal D, 43 (1-3), .
(doi:10.1140/epjd/e2007-00098-4).
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.
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Published date: 2007
Organisations:
Applied Mathematics
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Local EPrints ID: 198755
URI: http://eprints.soton.ac.uk/id/eprint/198755
ISSN: 1434-6060
PURE UUID: e8966222-c295-41f4-90ef-b334ec196928
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Date deposited: 06 Oct 2011 15:25
Last modified: 14 Mar 2024 04:14
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Author:
K. Kärkkäinen
Author:
M. Manninen
Author:
S. M. Reimann
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