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Q-Balls in the Pseudogap Phase of Superconducting HgBa2CuO4+y

Academic Article
Publication Date:
2023
abstract:
Fast and local probes, such as X-ray spectroscopy, X-ray diffraction (XRD), and X-ray microscopy, have provided direct evidence for nanoscale phase separation in high temperature perovskite superconductors composed of (i) free particles coexisting with (ii) Jahn Teller polarons (i.e., charges associated with local lattice distortions) not detected by slow experimental methods probing only delocalized states. Moreover, these experimental probes have shown the formation of a superstripes phase in the pseudogap regime below T* in cuprates. Here, we focus on the anomalous temperature dependence of short range X-ray diffraction CDW reflection satellites with high momentum transfer, probing both charge and lattice fluctuations in superconducting HgBaCuO (Hg1201) in the pseudogap regime below T* and above T. We report compelling evidence of the anomalous anticorrelation of the coherence volume with the peak maximum amplitude of the CDW XRD satellite by cooling below T*. This anomalous temperature trend of the short-range striped Jahn Teller polaronic CDW puddles is in agreement with predictions of the Q-ball theory of the quark gluon plasma extended to cuprates, providing compelling evidence for non topological soliton puddles of striped condensate of pairs in the pseudogap phase.
Iris type:
01.01 Articolo in rivista
Keywords:
high temperature superconductivity; synchrotron X-ray diffraction; charge density waves; Q-balls
List of contributors:
Barba, Luisa; Campi, Gaetano
Authors of the University:
BARBA LUISA
CAMPI GAETANO
Handle:
https://iris.cnr.it/handle/20.500.14243/464073
Published in:
CONDENSED MATTER
Journal
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http://www.scopus.com/record/display.url?eid=2-s2.0-85150981505&origin=inward
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