Knowledge

Bethe-Salpeter equation

5 linked papers

Bi₂Sr₂CaCu₂O₈+δ (Bi₂₂₁₂)

1 linked paper

Bilayer fermionic model (inspired byLa₃Ni₂O₇)

1 linked paper

bilayer nickelate

4 linked papers

bilayer nickelates

1 linked paper

Bilayer two-orbital Hubbard model

3 linked papers

Bogoliubov-de Gennes mean-field theory

1 linked paper

Bogoliubov–de Gennes theory

2 linked papers

Bosonic phases across the superconductor-insulator transition in infinite-layer samarium nickelate

This study realized a superconductor-insulator transition by fabricating infinite-layer samarium nickel oxide superconducting thin films into a spatially periodic network structure, thereby modulating the phase coherence of Cooper pairs. The observation of magnetoresistance oscillations with a period of h/2e in the experiments directly confirmed the existence of 2e Cooper pairs in nickel oxides. The transition was primarily driven by enhanced superconducting fluctuations, with Cooper pairs participating in charge transport throughout the entire transition process. Two anomalous metallic states were also identified: one emerging under finite magnetic fields and the other appearing even at zero magnetic field; both states could be characterized by bosonic excitations, suggesting the dynamic role of vortices in the ground state. This work establishes nickel oxides as a key platform for studying the rich bosonic phases arising from the modulation of Cooper pair phase coherence.

Bosonic Phases across the Superconductor-Insulator Transitions in Infinite-Layer Samarium Nickelate

Bosonic Phases across the Superconductor-Insulator Transitions in Infinite-Layer Samarium Nickelate