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Flat bands and topology in superconductive materials

Objective

Flat bands allow to increase the critical temperature of the superconducting transition thanks
to their high density of states. However a characterization of the flat bands that support a finite
supercurrent is open. In some cases a nonzero Chern number, a topological invariant of the band
structure, ensures a finite superfluid mass density. This tantalizing relation between topology and
superfluidity is novel and unexplored. My aim is to characterize superfluidity in lattice systems with flat
bands that have different symmetries, lattice structures, dimensionality, interparticle interactions
and possess different topological invariants, in order to provide a general picture of which ones
are potentially useful as a superconductor with high critical temperature. Whereas mean-field (BCS)
theory can provide an essential qualitative understanding and a transparent link to topological properties,
I plan to use more reliable methods such as Density Matrix Renormalization Group (DMRG)
in 1D and Dynamical Mean Field Theory (DMFT) in 2D and 3D. The ideal platform to test the
theoretical predictions are ultracold gases, but I expect to provide useful results also for multiband
superconductors, topological media, carbon-based superconductors, Quantum Hall systems
and high-Tc superconductors.

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Programme(s)

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Topic(s)

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Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

MSCA-IF-EF-ST - Standard EF

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) H2020-MSCA-IF-2015

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Coordinator

AALTO KORKEAKOULUSAATIO SR
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 191 325,60
Address
OTAKAARI 1
02150 Espoo
Finland

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Region
Manner-Suomi Helsinki-Uusimaa Helsinki-Uusimaa
Activity type
Higher or Secondary Education Establishments
Links
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 191 325,60
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