A new non-engineered SU(4) fermion model exhibits high-temperature charge-4e superconductivity via unbiased quantum Monte Carlo, with Tc increasing linearly with coupling and a BKT transition marked by a charge-4e stiffness jump.
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Unbiased QMC simulations of a bilayer t-J⊥-V model map a doping-driven transition from a spontaneous interlayer loop-current state to interlayer s-wave superconductivity, including a coexisting time-reversal-symmetry-breaking superconducting phase near the boundary.
Superconductivity in La3Ni2O7 arises from interlayer Cooper pairs of 3d_x2-y2 electrons driven by effective J_perp from Hund-assisted AFM exchange transfer, while localized 3d_z2 electrons form rung singlets that produce a pseudogap but no condensate.
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High-temperature charge-4e superconductivity in SU(4) interacting fermions
A new non-engineered SU(4) fermion model exhibits high-temperature charge-4e superconductivity via unbiased quantum Monte Carlo, with Tc increasing linearly with coupling and a BKT transition marked by a charge-4e stiffness jump.
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Time-reversal symmetry breaking superconductivity in the presence of loop-current fluctuations
Unbiased QMC simulations of a bilayer t-J⊥-V model map a doping-driven transition from a spontaneous interlayer loop-current state to interlayer s-wave superconductivity, including a coexisting time-reversal-symmetry-breaking superconducting phase near the boundary.
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Superconductivity in bilayer La$_3$Ni$_2$O$_7$: A review focusing on the strong-coupling Hund's rule assisted pairing mechanism
Superconductivity in La3Ni2O7 arises from interlayer Cooper pairs of 3d_x2-y2 electrons driven by effective J_perp from Hund-assisted AFM exchange transfer, while localized 3d_z2 electrons form rung singlets that produce a pseudogap but no condensate.