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18 papers · 1 filter
Unconventional superconductivity with preformed pairs in twisted bilayer graphene
SK Firoz Islam, A. Yu. Zyuzin, Alexander A. Zyuzin
We present a theory of superconductivity in magic-angle twisted bilayer graphene and analyze the superconducting phase diagram in presence of the magnetic field. Namely, we conside…
Preformed Cooper pairs in flat-band semimetals
Alexander A. Zyuzin, A. Yu. Zyuzin
We study conditions for the emergence of the preformed Cooper pairs in materials hosting flat bands. As a particular example, we consider a semimetal, with a pair of three-band cro…
Measurement of critical current flow and connectivity in systems of joined square superconducting plates
F. Colauto, D. Carmo, A. M. H. de Andrade +4
A method to measure the electrical connectivity between square superconducting plates joined by weak link interfaces is presented. It is based on observation of lines where the flo…
Effect of superconductivity on the shape of flat bands
V. R. Shaginyan, A. Z. Msezane, M. Ya. Amusia +1
For the first time, basing both on experimental facts and our theoretical consideration, we show that Fermi systems with flat bands should be tuned with the superconducting state.…
Disorder-induced exceptional points and nodal lines in Dirac superconductors
Alexander A. Zyuzin, Pascal Simon
We consider the effect of disorder on the spectrum of quasiparticles in the point-node and nodal-line superconductors. Due to the anisotropic dispersion of quasiparticles disorder…
Thermally driven inhibition of superconducting vortex avalanches
Antonio Lara, Farkhad G. Aliev, Victor V. Moshchalkov +1
Complex systems close to their critical state can exhibit abrupt transitions, avalanches, between their metastable states. It is a challenging task to understand the mechanism of t…