Vortex dynamics in the two-dimensional BCS-BEC crossover [PDF]
Nature Communications, 2022 The crossover between the limiting ground states of fermionic systems, the so called BCS-BEC crossover, is of interest to superconductor and ultracold atomic gases communities.
Max Heyl +7 more
doaj +8 more sources
Bypassing the lattice BCS–BEC crossover in strongly correlated superconductors through multiorbital physics [PDF]
npj Quantum Materials, 2023 Superconductivity emerges from the spatial coherence of a macroscopic condensate of Cooper pairs. Increasingly strong binding and localization of electrons into these pairs compromises the condensate’s phase stiffness, thereby limiting critical ...
Niklas Witt +5 more
doaj +4 more sources
Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS–BEC crossover [PDF]
Nature Communications, 2016 The crossover between the weak-coupling limit and strong-coupling limit provides important information for quantum bound states of interacting fermions. Here, Kasahara et al.
S. Kasahara +14 more
doaj +4 more sources
Test for BCS-BEC crossover in the cuprate superconductors [PDF]
npj Quantum Materials, 2023 In this paper we address the question of whether high-temperature superconductors have anything in common with BCS-BEC crossover theory. Towards this goal, we present a proposal and related predictions which provide a concrete test for the applicability ...
Qijin Chen +3 more
doaj +5 more sources
Thermal conductivity of an ultracold Fermi gas in the BCS-BEC crossover [PDF]
Scientific Reports, 2021 Recent experiments on sound waves in a unitary Fermi gas reveal many transport properties about strongly interacting fermions. Sound propagates through the coupling of momentum and heat transport, and attenuates strongly with the presence of a phase ...
Hang Zhou, Yongli Ma
doaj +3 more sources
Tuning the BCS-BEC crossover of electron-hole pairing with pressure [PDF]
Nature CommunicationsIn graphite, a moderate magnetic field confines electrons and holes into their lowest Landau levels. In the extreme quantum limit, two insulating states with a dome-like field dependence of the their critical temperatures are induced by the magnetic ...
Yuhao Ye +7 more
doaj +4 more sources
Quantum Thermalization Dynamics of Fermi Gases Quenched to the BEC‐BCS Crossover [PDF]
Advanced ScienceUnderstanding nonequilibrium dynamics of strongly interacting quantum systems represents one of the most challenging problems in many‐body physics.
Licheng Yi +4 more
doaj +3 more sources
Thermal BCS-BEC Crossovers in Finite Systems [PDF]
EntropyWe investigate the thermal evolution of fermionic pairings in a finite-size SU(2) × SU(2) complex model, drawing an analogy to the BCS-BEC crossover in interacting quantum gases.
Angelo Plastino +2 more
doaj +3 more sources
Absence of a BCS-BEC crossover in the cuprate superconductors [PDF]
npj Quantum Materials, 2023 We examine key aspects of the theory of the Bardeen–Cooper–Schrieffer (BCS) to Bose–Einstein condensation (BEC) crossover, focusing on the temperature dependence of the chemical potential, μ.
John Sous, Yu He, Steven A. Kivelson
doaj +2 more sources
Tuning across the BCS-BEC crossover in the multiband superconductor Fe1+y Se x Te1-x : An angle-resolved photoemission study. [PDF]
Sci Adv, 2017 A BCS-BEC crossover in a multiband superconductor has been observed experimentally using ARPES. The crossover from Bardeen-Cooper-Schrieffer (BCS) superconductivity to Bose-Einstein condensation (BEC) is difficult to realize in quantum materials because,
Rinott S +8 more
europepmc +3 more sources