Cuprates exhibit exceptionally strong superconductivity. To understand why, it is essential to
elucidate the nature of the electronic interactions that cause pairing. Superconductivity …

The structures, the phase diagrams, and the appearance of a neutron resonance signaling
an unconventional superconducting state provide phenomenological evidence relating the …

Superconductivity often emerges in the proximity of, or in competition with, symmetry-
breaking ground states such as antiferromagnetism or charge density waves,,,,(CDW). A …

The pseudogap is a partial gap in the electronic density of states that opens in the normal
(non-superconducting) state of cuprate superconductors and whose origin is a long …

Fermi systems in the cross-over regime between weakly coupled Bardeen–Cooper–
Schrieffer (BCS) and strongly coupled Bose–Einstein-condensate (BEC) limits are among …

Electronic charges introduced in copper-oxide (CuO2) planes generate high-transition-
temperature (T c) superconductivity but, under special circumstances, they can also order …

The spectral energy gap is an important signature that defines states of quantum matter:
insulators, density waves and superconductors have very different gap structures. The …

We report the results of a comprehensive study of charge-density wave (CDW) correlations
in untwinned YBa 2 Cu 3 O 6+ x single crystals with 0.4≤ x≤ 0.99 using Cu L 3 edge …

Charge density wave (CDW) correlations have been shown to universally exist in cuprate
superconductors. However, their nature at high fields inferred from nuclear magnetic …

Upon introducing charge carriers into the copper–oxygen sheets of the enigmatic lamellar
cuprates, the ground state evolves from an insulator to a superconductor and eventually to a …