2021
DOI: 10.3390/condmat6040050
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Extremely Overdoped Superconducting Cuprates via High Pressure Oxygenation Methods

Abstract: Within the cuprate constellation, one fixed star has been the superconducting dome in the quantum phase diagram of transition temperature vs. the excess charge on the Cu in the CuO2-planes, p, resulting from O-doping or cation substitution. However, a more extensive search of the literature shows that the loss of the superconductivity in favor of a normal Fermi liquid on the overdoped side should not be assumed. Many experimental results from cuprates prepared by high-pressure oxygenation show Tc converging to… Show more

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Cited by 8 publications
(9 citation statements)
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References 100 publications
(210 reference statements)
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“…The lattice parameter and aperiodic local lattice distortions associated with variable microstrain are not key physical parameters in BCS or unconventional superconductivity theories. Nevertheless, compelling evidence for the key roles of the CuO 2 lattice in the mechanism of high-temperature superconductivity and charge density wave (CDW) phenomena in cuprate perovskites has been reported [7][8][9][10][11]. These findings confirm early experimental results provided by local and fast experimental methods based on the use of synchrotron X-ray radiation [12][13][14][15][16] pointing toward the relevant role of the micro-strain in superconducting cuprate perovskites [17,18].…”
Section: Introductionsupporting
confidence: 63%
“…The lattice parameter and aperiodic local lattice distortions associated with variable microstrain are not key physical parameters in BCS or unconventional superconductivity theories. Nevertheless, compelling evidence for the key roles of the CuO 2 lattice in the mechanism of high-temperature superconductivity and charge density wave (CDW) phenomena in cuprate perovskites has been reported [7][8][9][10][11]. These findings confirm early experimental results provided by local and fast experimental methods based on the use of synchrotron X-ray radiation [12][13][14][15][16] pointing toward the relevant role of the micro-strain in superconducting cuprate perovskites [17,18].…”
Section: Introductionsupporting
confidence: 63%
“…The SCO sample was made and characterized for these experiments and consisted solely of the T c = 95 K variant [67,68] confirmed by XRD and the susceptibility measurements. The grain morphology of HPO cuprates often results in relatively low superconducting fractions [69], but that for the 75 K phase of SCO was stated as ∼85% and muonspin relaxation demonstrates that this is a surface effect, with the actual fraction being ∼80% for YSCO-Mo. On this matter, it has been shown both theoretically and experimentally in both cuprates and conventional superconductors that the measured Meissner fraction is highly dependent on the sizes and shapes of the grains, the internal arrangement of their superconducting domains, their packing in the sample, and their conductive connections, with polycrystalline samples usually giving values below ∼40% [70][71][72].…”
Section: Methodsmentioning
confidence: 99%
“…Bilayers of atomic cuprate oxide superconductors appear to be not less interesting. While the lattice parameter and aperiodic local lattice distortions associated with variable microstrain are not a key physical parameter either in BCS and unconventional superconductivity theories, a compelling evidence for the key role of CuO 2 lattice in the mechanism of high-temperature superconductivity and charge density wave (CDW) phenomena in cuprate perovskites has been reported [7][8][9][10][11] . These findings confirm early experimental results provided by local and fast experimental methods based on the use of synchrotron X-ray radiation [12][13][14][15][16] pointing toward the relevant role of the micro-strain in superconducting cuprate perovskites 17,18 .…”
Section: Introductionmentioning
confidence: 99%