Evolution of multigap superconductivity in the atomically thin limit: Strain-enhanced three-gap superconductivity in monolayer
Starting from first principles, we show the formation and evolution of superconducting gaps
in MgB 2 at its ultrathin limit. Atomically thin MgB 2 is distinctly different from bulk MgB 2 in …
in MgB 2 at its ultrathin limit. Atomically thin MgB 2 is distinctly different from bulk MgB 2 in …
Dimensional crossover and incipient quantum size effects in superconducting niobium nanofilms
Superconducting and normal state properties of Niobium nanofilms have been
systematically investigated as a function of film thickness, on different substrates. The width …
systematically investigated as a function of film thickness, on different substrates. The width …
Screening of pair fluctuations in superconductors with coupled shallow and deep bands: A route to higher-temperature superconductivity
A combination of strong Cooper pairing and weak superconducting fluctuations is crucial to
achieve and stabilize high-T c superconductivity. We demonstrate that a coexistence of a …
achieve and stabilize high-T c superconductivity. We demonstrate that a coexistence of a …
Constrained weak-coupling superconductivity in multiband superconductors
We consider superconductivity in a system with N Fermi surfaces, including intraband and
interband effective electron-electron interactions. The effective interaction is described by an …
interband effective electron-electron interactions. The effective interaction is described by an …
Berezinskii-Kosterlitz-Thouless phase transition with Rabi-coupled bosons
We theoretically investigate the superfluid–normal-state Berezinskii-Kosterlitz-Thouless
transition in a binary mixture of bosonic atoms with Rabi coupling under balanced densities …
transition in a binary mixture of bosonic atoms with Rabi coupling under balanced densities …
Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry
We study superconducting three-band systems within strong-coupling Eliashberg theory. In
particular, we search for phase-frustrated superconducting systems with spontaneous time …
particular, we search for phase-frustrated superconducting systems with spontaneous time …
Sweeping across the BCS-BEC crossover, reentrant, and hidden quantum phase transitions in two-band superconductors by tuning the valence and conduction …
Two-band electronic structures with a valence and a conduction band separated by a
tunable energy gap and with pairing of electrons in different channels can be relevant to …
tunable energy gap and with pairing of electrons in different channels can be relevant to …
trilayer film: A four-gap superconductor
Since the discovery of two-gap superconductivity in bulk MgB 2, many efforts have been
devoted to searching for multigap superconductors. Recently, a monolayer of MgB 2 and a …
devoted to searching for multigap superconductors. Recently, a monolayer of MgB 2 and a …
Enhanced critical temperature, pairing fluctuation effects, and BCS-BEC crossover in a two-band Fermi gas
We study the superfluid critical temperature in a two-band attractive Fermi system with strong
pairing fluctuations associated with both interband and intraband couplings. We focus …
pairing fluctuations associated with both interband and intraband couplings. We focus …
Emergent Fano-Feshbach resonance in two-band superconductors with an incipient quasiflat band: Enhanced critical temperature evading particle-hole fluctuations
In superconductivity, a surge of interests in enhancing T c is ever mounting, where a recent
focus is toward multiband superconductivity. In T c enhancements specific to two-band …
focus is toward multiband superconductivity. In T c enhancements specific to two-band …