Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Physical Review Letters, Volume 117, issue 4, pp. 1-6
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
Keywords
Other note
Citation
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