Fulde-Ferrell-Larkin-Ovchinnikov state in the dimensional crossover between one- and three-dimensional lattices

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2012

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Department of Applied Physics

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Language

en

Pages

4
1-4

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PHYSICAL REVIEW B, Volume 85, issue 18

Abstract

We present a full phase diagram for the one-dimensional (1D) to three-dimensional (3D) crossover of the Fulde-Ferrell–Larkin-Ovchinnikov (FFLO) state in an attractive Hubbard model of 3D-coupled chains in a harmonic trap. We employ real-space dynamical mean-field theory which describes full local quantum fluctuations beyond the usual mean-field and local density approximation. We find strong dimensionality effects on the shell structure undergoing a crossover between distinctive quasi-1D and quasi-3D regimes. We predict an optimal regime for the FFLO state that is considerably extended to intermediate interchain couplings and polarizations, directly realizable with ultracold atomic gases. We find that the 1D-like FFLO feature is vulnerable to thermal fluctuations, while the FFLO state of mixed 1D-3D character can be stabilized at a higher temperature.

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Keywords

quantum gases, strongly correlated systems, superconductivity

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DOI

10.1103/PhysRevB.85.180508

Citation

Kim , D-H & Törmä , P 2012 , ' Fulde-Ferrell-Larkin-Ovchinnikov state in the dimensional crossover between one- and three-dimensional lattices ' , Physical Review B , vol. 85 , no. 18 , 180508 , pp. 1-4 . https://doi.org/10.1103/PhysRevB.85.180508

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https://urn.fi/URN:NBN:fi:aalto-201609093786

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[article-cris] Perustieteiden korkeakoulu / SCI