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.
| Original language | English |
|---|---|
| Article number | 045303 |
| Pages (from-to) | 1-6 |
| Journal | Physical Review Letters |
| Volume | 117 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 22 Jul 2016 |
| MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Geometric Origin of Superfluidity in the Lieb-Lattice Flat Band'. Together they form a unique fingerprint.Projects
- 1 Finished
-
FLATOPS: Flat bands and topology in superconductive materials
Peotta, S. (Principal investigator)
01/04/2016 → 31/03/2018
Project: EU: Framework programmes funding
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Prizes
-
Marie Skłodowska-Curie Action (Individual Fellowship)
Peotta, S. (Recipient), 1 Apr 2016
Prize: Invitation or ranking in competition
Activities
- 1 Invited academic talk
-
Quantum metric and superfluidity
Peotta, S. (Speaker)
9 Sept 2022Activity: Talk or presentation types › Invited academic talk
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