Showing 2026Show all
3 papers · 1 filter
cond-mat.supr-con2026
Emergent BEC mechanism in flat-band superconductors
V. Berger, I. S. Tupitsyn, B. Currie +3
The formation of bound bosonic pairs of fermions, followed by their Bose-Einstein (quasi) condensation (BEC), is a foundational mechanism of superconductivity. At low filling, flat…
cond-mat.str-el2026
Avoided Stoner instability at a single ordinary Van Hove point
I. S. Tupitsyn, B. Currie, A. V. Chubukov +3
When the Fermi surface and the Brillouin zone boundary touch at a Van Hove point, mean-field analysis predicts a ferromagnetic (Stoner) instability at finite for any coupl…
cond-mat.supr-con2026
Numerically Exact Study of Flat-Band Superconductivity
I. S. Tupitsyn, B. Currie, B. V. Svistunov +2
Current theories of high-temperature superconductivity in flat-band systems predict a linear dependence of the transition temperature on the attractive interaction, …