Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2016-07-22
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Language
en
Pages
1-6
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Physical Review Letters, Volume 117, issue 4
Abstract
The ground state and transport properties of the Lieb lattice flat band in the presence of an attractive Hubbard interaction are considered. It is shown that the superfluid weight can be large even for an isolated and strictly flat band. Moreover the superfluid weight is proportional to the interaction strength and to the quantum metric, a band structure quantity derived solely from the flat-band Bloch functions. These predictions are amenable to verification with ultracold gases and may explain the anomalous behavior of the superfluid weight of high-Tc superconductors.Description
| openaire: EC/FP7/340748/EU//CODE | openaire: EC/H2020/702281/EU//FLATOPS
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Julku, A, Peotta, S, Vanhala, T I, Kim, D H & Törmä, P 2016, ' Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band ', Physical Review Letters, vol. 117, no. 4, 045303, pp. 1-6 . https://doi.org/10.1103/PhysRevLett.117.045303
