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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
2019 Physical review B  

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2019 pre-print arXiv:1906.05021v1 fatcat:mfbmoxq7hvakbbiw6bg4kyupxa
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 unravelling the connection between the various instabilities of the underdoped regime. In the high-temperature superconductor (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x)Cu_3O_y (CLBLCO) isovalent chemical substitution produces smooth changes to the CuO_2 plane buckling and the Cu(II)-to-apical-oxygen distance, allowing us to
more » ... tudy 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 the first observation of incommensurate CDW correlations in CLBLCO and demonstrate a lack of correlation between T_CDW and the pseudogap crossover temperature (T^∗). This result disfavours a scenario in which the opening of the pseudogap at T^∗ results from fluctuating CDW correlations.
doi:10.1103/physrevb.100.035129 fatcat:bosg2utldbd2lkwnp2dm6matai
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M. Bluschke, M. Yaari, E. Schierle, G. Bazalitsky, J. Werner, E. Weschke, A. Keren. "Adiabatic variation of the charge density wave phase diagram in the 123 cuprate (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy." Physical review B 100.3 (2019)