Coexistence of near- Flat Band and Van Hove Singularity in a Two-Phase Superconductor
Quantum many-body systems, particularly, the ones with large near-EF density states, are
well known for exhibiting rich phase diagrams as a result of enhanced electron correlations …
well known for exhibiting rich phase diagrams as a result of enhanced electron correlations …
Quantum geometry encoded to pair potentials
Bloch wave functions of electrons have properties called quantum geometry, which has
recently attracted much attention as the origin of intriguing physical phenomena. In this …
recently attracted much attention as the origin of intriguing physical phenomena. In this …
Theoretical study of spin-fluctuation-mediated superconductivity in two-dimensional Hubbard models with an incipient flat band
T Aida, K Matsumoto, D Ogura, M Ochi, K Kuroki - Physical Review B, 2024 - APS
One promising way to enhance superconductivity is to have coexisting wide and incipient
narrow bands, where the Fermi level intersecting the wide band lies just above the narrow …
narrow bands, where the Fermi level intersecting the wide band lies just above the narrow …
Altermagnetic Instabilities from Quantum Geometry
N Heinsdorf - arXiv preprint arXiv:2410.12789, 2024 - arxiv.org
Altermagnets are a newly identified type of collinear anti-ferromagnetism with vanishing net
magnetic moment, characterized by lifted Kramers' degeneracy in parts of the Brillouin zone …
magnetic moment, characterized by lifted Kramers' degeneracy in parts of the Brillouin zone …
Symmetry-enforced double Weyl points, multiband quantum geometry, and singular flat bands of doping-induced states at the Fermi level
MM Hirschmann, J Mitscherling - Physical Review Materials, 2024 - APS
Two common difficulties in the design of topological quantum materials are that the desired
features lie too far from the Fermi level and are spread over a too-large energy range …
features lie too far from the Fermi level and are spread over a too-large energy range …
Majorana Zero Modes in Lieb-Kitaev Model with Tunable Quantum Metric
The relation between band topology and Majorana zero energy modes (MZMs) in
topological superconductors had been well studied in the past decades. However, the …
topological superconductors had been well studied in the past decades. However, the …
Quantum Geometric Unconventional Superconductivity
Coulomb repulsion can, counterintuitively, mediate Cooper pairing via the Kohn-Luttinger
mechanism. However, it is commonly believed that observability of the effect requires …
mechanism. However, it is commonly believed that observability of the effect requires …
Quantum geometric superfluid weight in multiband superconductors: A microscopic interpretation
YJ Hu, W Huang - arXiv preprint arXiv:2409.12254, 2024 - arxiv.org
Even in non-interacting limit, electrons on different Bloch bands of a multiband system do not
move as if they are oblivious to the presence of one another. Instead, they move in concert …
move as if they are oblivious to the presence of one another. Instead, they move in concert …
Berry monopoles and divergent quantum metric in systems with non-integer band dispersion
JOA Biscocho, KHA Villegas - arXiv preprint arXiv:2410.14213, 2024 - arxiv.org
We investigate the quantum geometric tensor, which is comprised of the Berry curvature and
quantum metric, in a generalized Dirac two-band system with non-integer dispersion, $ E …
quantum metric, in a generalized Dirac two-band system with non-integer dispersion, $ E …
Pair size and quantum geometry in a multiband Hubbard model
M Iskin - arXiv preprint arXiv:2409.14921, 2024 - arxiv.org
We study the size of two-body bound states and Cooper pairs within a multiband Hubbard
model that features time-reversal symmetry and uniform pairing on a generic lattice. Our …
model that features time-reversal symmetry and uniform pairing on a generic lattice. Our …