Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band

Aleksi Julku; Sebastiano Peotta; Tuomas I. Vanhala; Dong Hee Kim; Päivi Törmä

doi:10.1103/PhysRevLett.117.045303

Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band

Aleksi Julku, Sebastiano Peotta, Tuomas I. Vanhala, Dong Hee Kim, Päivi Törmä

Gwangju Institute of Science and Technology

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

244 Sitaatiot (Scopus)

884 Lataukset (Pure)

Abstrakti

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.

Alkuperäiskieli	Englanti
Artikkeli	045303
Sivut	1-6
Julkaisu	Physical Review Letters
Vuosikerta	117
Numero	4
DOI - pysyväislinkit	https://doi.org/10.1103/PhysRevLett.117.045303
Tila	Julkaistu - 22 heinäk. 2016
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1103/PhysRevLett.117.045303

PhysRevLett.117Final published version, 668 KB

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Science-IT
Hakala, M. (Manager)
Perustieteiden korkeakoulu
Laitteistot/tilat: Facility

Marie Skłodowska-Curie Action (Individual Fellowship)
Peotta, S. (Recipient), 1 huhtik. 2016
Palkinto: Sijoittuminen kilpailussa tai osallistuminen kutsukilpailuun

Quantum metric and superfluidity
Peotta, S. (Puhuja)
9 syysk. 2022
Aktiviteetti: Kutsuttu akateeminen esitelmä

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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 = jul,

day = "22",

doi = "10.1103/PhysRevLett.117.045303",

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journal = "Physical Review Letters",

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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.

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U2 - 10.1103/PhysRevLett.117.045303

DO - 10.1103/PhysRevLett.117.045303

M3 - Article

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VL - 117

SP - 1

EP - 6

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

M1 - 045303

ER -

Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band

Abstrakti

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Science-IT

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Marie Skłodowska-Curie Action (Individual Fellowship)

Aktiviteetit

Quantum metric and superfluidity

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