Mott gap collapse in lightly hole-doped Sr2−xKxIrO4
نویسندگان
چکیده
منابع مشابه
Contrasting Pathways to Mott Gap Collapse in Electron and Hole Doped Cuprates
Recent ARPES measurements on the electron-doped cuprate Nd2−xCexCuO4 can be interpreted in a mean field model of uniform doping of an antiferromagnet, with the Mott gap closing near optimal doping. Mode coupling calculations confirm the mean field results, while clarifying the relation between the Mott gap and shortrange magnetic order. The same calculations find that hole doped cuprates should...
متن کاملCollapse of the Mott Gap and Emergence of a Nodal Liquid in Lightly Doped Sr(2)IrO(4).
We report angle resolved photoemission experiments on the electron doped Heisenberg antiferromagnet (Sr(1-x)La(x))(2)IrO(4). For a doping level of x=0.05, we find an unusual metallic state with coherent nodal excitations and an antinodal pseudogap bearing strong similarities with underdoped cuprates. This state emerges from a rapid collapse of the Mott gap with doping resulting in a large under...
متن کاملVisualization of the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator
Superconductivity emerges from the cuprate antiferromagnetic Mott state with hole doping. The resulting electronic structure1 is not understood, although changes in the state of oxygen atoms seem paramount2–5. Hole doping first destroys the Mott state, yielding a weak insulator6,7 where electrons localize only at low temperatures without a full energy gap. At higher doping levels, the ‘pseudoga...
متن کاملDoped Mott insulators are insulators: hole localization in the cuprates.
We demonstrate that a Mott insulator lightly doped with holes is still an insulator at low temperature even without disorder. Hole localization obtains because the chemical potential lies in a pseudogap which has a vanishing density of states at zero temperature. The energy scale for the pseudogap is set by the nearest-neighbor singlet-triplet splitting. As this energy scale vanishes if transit...
متن کاملNature of strong hole pairing in doped Mott antiferromagnets
Cooper pairing instability in a Fermi liquid is well understood by the BCS theory, but pairing mechanism for doped Mott insulators still remains elusive. Previously it has been shown by density matrix renormalization group (DMRG) method that a single doped hole is always self-localized due to the quantum destructive interference of the phase string signs hidden in the t-J ladders. Here we repor...
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ژورنال
عنوان ژورنال: Nature Communications
سال: 2020
ISSN: 2041-1723
DOI: 10.1038/s41467-020-16425-z