Iron pnictides and chalcogenides: a new paradigm for superconductivity. Stripes developed at the strong limit of nematicity in FeSe film. Antiferromagnetic order and spin dynamics in iron-based superconductors. Nematic electronic structure in the “parent” state of the iron-based superconductor Ca(Fe 1-xCo x) 2As 2. High-temperature superconductivity in monolayer Bi 2Sr 2CaCu 2O 8+δ. Discovery of a Cooper-pair density wave state in a transition-metal dichalcogenide. Magnetic field-induced pair density wave state in the cuprate vortex halo. Visualization of the periodic modulation of Cooper pairing in a cuprate superconductor. Pair-density-wave correlations in the Kondo–Heisenberg model. Amperean pairing and the pseudogap phase of cuprate superconductors. Charge-4e superconductivity from pair-density-wave order in certain high-temperature superconductors. Dislocations and vortices in pair-density-wave superconductors. Dynamical layer decoupling in a stripe-ordered high- T c superconductor. Pair density wave in the pseudogap state of high temperature superconductors. Superconductivity in a strong spin-exchange field. Roton pair density wave in a strong-coupling kagome superconductor. Imaging the energy gap modulations of the cuprate pair-density-wave state. Detection of a Cooper-pair density wave in Bi 2Sr 2CaCu 2O 8+x. Colloquium: theory of intertwined orders in high temperature superconductors. The physics of pair-density waves: cuprate superconductors and beyond.
The discovery of the PDW state in the monolayer Fe(Te,Se) film provides a low-dimensional platform to study the interplay between the correlated electronic states and unconventional Cooper pairing in high- T c superconductors.Īgterberg, D. The PDW state with a period of λ ≈ 3.6 a Fe ( a Fe is the distance between neighbouring Fe atoms) is observed at the domain walls by the spatial electronic modulations of the local density of states, the superconducting gap and the π-phase shift boundaries of the PDW around the vortices of the intertwined charge density wave order. Here, using scanning tunnelling microscopy and spectroscopy, we report the discovery of the PDW state in monolayer iron-based high- T c Fe(Te,Se) films grown on SrTiO 3(001) substrates. However, the PDW order in iron-based high- T c superconductors has not been observed experimentally. Evidence for the existence of intrinsic PDW order in high-temperature (high- T c) cuprate superconductors 3, 4 and kagome superconductors 5 has emerged recently. The pair density wave (PDW) is an extraordinary superconducting state in which Cooper pairs carry non-zero momentum 1, 2.
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