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Effect of the pseudogap on the transition temperature in the cuprates and implications for its origin

Journal Article · · Nature Physics
DOI:https://doi.org/10.1038/NPHYS2926· OSTI ID:1356590
 [1];  [2];  [3];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Univ. of Virginia, Charlottesville, VA (United States). Department of Physics
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Chicago, IL (United States). Department of Physics
We present cuprates that possess a large pseudogap that spans much of their phase diagram. The origin of this pseudogap is as debated as the mechanism for high-temperature superconductivity. In one class of theories, the pseudogap arises from some instability not related to pairing, typically charge, spin or orbital current ordering. Evidence of this has come from a variety of measurements indicating symmetry breaking. On the other side are theories where the pseudogap is associated with pairing. This ranges from preformed pairs to resonating valence bond theories where spin singlets become charge coherent. Here, we study pairing in the cuprates by constructing the pair vertex using spectral functions derived from angle-resolved photoemission data. Assuming that the pseudogap is not due to pairing, we find that the superconducting instability is strongly suppressed, in stark contrast to what is actually observed. We trace this suppression to the destruction of the BCS logarithmic singularity from a combination of the pseudogap and lifetime broadening. In conclusion, our findings strongly support those theories of the cuprates where the pseudogap is instead due to pairing.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357; AC02-98CH10886
OSTI ID:
1356590
Journal Information:
Nature Physics, Journal Name: Nature Physics Journal Issue: 5 Vol. 10; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Effect of annealing on a pseudogap state in untwinned YBa2Cu3O7−δ single crystals journal June 2019
Peculiarities of pseudogap in Y0.95Pr0.05Ba2Cu3O7−δ single crystals under pressure up to 1.7 GPa journal December 2019
Band-edge BCS–BEC crossover in a two-band superconductor: physical properties and detection parameters journal October 2014
Charge-density-wave order with momentum ( 2 Q , 0 ) and ( 0 , 2 Q ) within the spin-fermion model: Continuous and discrete symmetry breaking, preemptive composite order, and relation to pseudogap in hole-doped cuprates journal July 2014
Specific temperature dependence of pseudogap in YBa 2 Cu 3 O 7 − δ nanolayers journal December 2016
Valence transition model of the pseudogap, charge order, and superconductivity in electron-doped and hole-doped copper oxides journal November 2018
Critical Exponents of Strongly Correlated Fermion Systems from Diagrammatic Multiscale Methods journal June 2014
Fluctuation Diagnostics of the Electron Self-Energy: Origin of the Pseudogap Physics journal June 2015
Colloquium : Theory of intertwined orders in high temperature superconductors journal May 2015
Band-edge BCS-BEC crossover in a two-band superconductor: physical properties and detection parameters text January 2014

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