2006/11/14 by T. Honma, Tatsuya Honma, P. H. Hor · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #astro-ph #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.75.012508
published as Phys.Rev. B75 (2007) 012508 · 4 pages, 2 figures
arxiv created 2006/11/14 · openalex publication_date 2007/01/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study superconducting transition temperature (Tc) of oxygen-doped double-layer high-temperature superconductors YBa2Cu3O_6+\ensuremathδ (0\ensuremath\leqslant\ensuremathδ\ensuremath\leqslant1) as a function of the oxygen dopant concentration (\ensuremathδ) and planar hole-doping concentration (Ppl). We find that Tc, while clearly influenced by the development of the chain ordering as seen in the Tc vs \ensuremathδ plot, lies on a universal curve originating at the critical hole concentration (Pc)=1∕16 in the Tc vs Ppl plot. Our analysis suggests that the universal behavior of Tc(Ppl) can be understood in terms of the competition and collaboration of chemical phases and electronic phases that exist in the system. We conclude that the global superconductivity behavior of YBa2Cu3O_6+\ensuremathδ as a function of doping is electronically driven and dictated by pristine electronic phases at magic doping numbers that follow the hierarchical order based on Pc, such as 2\ifmmode×\else\texttimes\fiPc, 3\ifmmode×\else\texttimes\fiPc, and 4\ifmmode×\else\texttimes\fiPc. We find that there are at least two intrinsic electronic superconducting phases of Tc=60\phantom\rule0.3em0exK at 2\ifmmode×\else\texttimes\fiPc=1∕8 and Tc=90\phantom\rule0.3em0exK at 3\ifmmode×\else\texttimes\fiPc=3∕16.