TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.7.2.018
TI  - Hidden symmetry of Bogoliubov de Gennes quasi-particle eigenstates and universal relations in flat band superconducting bipartite lattices
PY  - 2024/04/09
UR  - https://scipost.org/SciPostPhysCore.7.2.018
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 7
IS  - 2
SP  - 018
A1  - Bouzerar, Georges
AU  - Thumin, Maxime
AB  - Unconventional flat band (FB) superconductivity, as observed in van der Waals heterostructures, could open promising avenues towards high-T$_c$ materials. In FBs, pairings and superfluid weight scale linearly with the interaction parameter, such an unusual behaviour justifies and encourages strategies to promote FB engineering. Bipartite lattices (BLs) which naturally host FBs could be particularly interesting candidates. Within Bogoliubov de Gennes theory and in the framework of the attractive Hubbard model in BLs, a hidden symmetry of the quasi-particle eigenstates is revealed. As a consequence, we demonstrate universal relations for the pairings and the superfluid weight that are independent of the characteristics of the hopping term. Remarkably, it is shown that these general properties are insensitive to disorder as long as the bipartite character is protected.
ER  -

@Article{10.21468/SciPostPhysCore.7.2.018,
	title={{Hidden symmetry of Bogoliubov de Gennes quasi-particle eigenstates and universal relations in flat band superconducting bipartite lattices}},
	author={Georges Bouzerar and Maxime Thumin},
	journal={SciPost Phys. Core},
	volume={7},
	pages={018},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.7.2.018},
	url={https://scipost.org/10.21468/SciPostPhysCore.7.2.018},
}