Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band

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Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band. / Julku, Aleksi; Peotta, Sebastiano; Vanhala, Tuomas I.; Kim, Dong Hee; Törmä, Päivi.

In: Physical Review Letters, Vol. 117, No. 4, 045303, 22.07.2016, p. 1-6.

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@article{82cd06cc047e44e7a2b94b37dbcc0249,
title = "Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band",
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.",
author = "Aleksi Julku and Sebastiano Peotta and Vanhala, {Tuomas I.} and Kim, {Dong Hee} and P{\"a}ivi T{\"o}rm{\"a}",
note = "| openaire: EC/FP7/340748/EU//CODE | openaire: EC/H2020/702281/EU//FLATOPS",
year = "2016",
month = "7",
day = "22",
doi = "10.1103/PhysRevLett.117.045303",
language = "English",
volume = "117",
pages = "1--6",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "4",

}

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TY - JOUR

T1 - Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band

AU - Julku, Aleksi

AU - Peotta, Sebastiano

AU - Vanhala, Tuomas I.

AU - Kim, Dong Hee

AU - Törmä, Päivi

N1 - | openaire: EC/FP7/340748/EU//CODE | openaire: EC/H2020/702281/EU//FLATOPS

PY - 2016/7/22

Y1 - 2016/7/22

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84979211218&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.117.045303

DO - 10.1103/PhysRevLett.117.045303

M3 - Article

VL - 117

SP - 1

EP - 6

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 4

M1 - 045303

ER -

ID: 6748715