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Version: publishedVersion × Subject: High-temperature superconductors ×

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    Mapping High-Temperature Superconductors—A Scientometric Approach
    (New York, NY : Springer, 2008) Barth, Andreas; Marx, Werner
    This study has been carried out to analyze the research field of high-temperature superconductivity and to demonstrate the potential of modern databases and search systems for generating meta-information. The alkaline earth (A2) rare earth (RE) cuprate high-temperature superconductors as a typical inorganic compound family and the corresponding literature were analyzed by scientometric methods. The time dependent overall number of articles and patents and of the publications related to specific compound subsets and subject categories are given. The data reveal a significant decrease of basic research activity in this research field. The A2 RE cuprate species covered by the CAS compound file were analyzed with respect to the occurrence of specific elements in order to visualize known and unknown substances and to identify characteristic patterns. The quaternary and quinternary cuprates were selected and the number of compound species as a function of specific combinations of A2 and RE elements is given. The Cu/O and RE/A2 ratios of the quaternary cuprate species as a function of A2 and RE atoms are shown. In addition, the research landscape of the MgB2 related publications was established using STN AnaVist, an analysis tool recently developed by STN International.
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    Measurement of Spin Dynamics in a Layered Nickelate Using X-Ray Photon Correlation Spectroscopy: Evidence for Intrinsic Destabilization of Incommensurate Stripes at Low Temperatures
    (College Park, Md. : APS, 2021) Ricci, Alessandro; Poccia, Nicola; Campi, Gaetano; Mishra, Shrawan; Müller, Leonard; Joseph, Boby; Shi, Bo; Zozulya, Alexey; Buchholz, Marcel; Trabant, Christoph; Lee, James C. T.; Viefhaus, Jens; Goedkoop, Jeroen B.; Nugroho, Agustinus Agung; Braden, Markus; Roy, Sujoy; Sprung, Michael; Schüßler-Langeheine, Christian
    We study the temporal stability of stripe-type spin order in a layered nickelate with x-ray photon correlation spectroscopy and observe fluctuations on timescales of tens of minutes over a wide temperature range. These fluctuations show an anomalous temperature dependence: they slow down at intermediate temperatures and speed up on both heating and cooling. This behavior appears to be directly connected with spatial correlations: stripes fluctuate slowly when stripe correlation lengths are large and become faster when spatial correlations decrease. A low-temperature decay of nickelate stripe correlations, reminiscent of what occurs in cuprates as a result of a competition between stripes and superconductivity, hence occurs via loss of both spatial and temporal correlations.