Adiabatic variation of the charge density wave phase diagram in the 123 cuprate (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy
M. Bluschke, M. Yaari, E. Schierle, G. Bazalitsky, J. Werner, E. Weschke, A. Keren
DOI 10.1103/PhysRevB.100.035129 · Physical Review B
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Abstract
In order to explain the emergence of the anomalous pseudogap state and high-temperature superconductivity in the cuprates, intense research activity over three decades has focused on unraveling the connection between the various instabilities of the underdoped regime. In the high-temperature superconductor (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy (CLBLCO) isovalent chemical substitution produces smooth changes to the CuO2 plane buckling and the Cu ii-to-apical-oxygen distance, allowing us to study the interdependence of charge density wave (CDW) order, superconductivity, and the pseudogap at constant hole doping in two adiabatically connected representations of the 123 cuprate structure. In this study, resonant soft x-ray scattering measurements reveal CDW correlations in CLBLCO and demonstrate a lack of correlation between TCDW and the pseudogap crossover temperature T*. This result disfavors a scenario in which the opening of the pseudogap at T* results from fluctuating CDW correlations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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