Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Gwangju Institute of Science and Technology

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli045303
Sivut1-6
JulkaisuPhysical Review Letters
Vuosikerta117
Numero4
TilaJulkaistu - 22 heinäkuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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