17O-NMRKnight shift study of the interplay between superconductivity and pseudogap in(CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy

2014/03/31 by T. Cvitanic, Tonči Cvitanić, Damjan Pelc +7
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Doping #Knight shift #Magnetic and transport properties of perovskites and related materials #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Superconductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.90.054508

published as Phys. Rev. B 90, 054508 (2014) · 6 pages

arxiv created 2014/07/16 · openalex publication_date 2014/08/12 · arxiv updated 2014/08/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report systematic ¹⁷O-NMR measurements on the high-T_c cuprate (Ca_xLa_1\ensuremath-x)(Ba_1.75\ensuremath-xLa_0.25+x)Cu₃O_y, for four different families (different x). Using Knight shift data, we show that the pseudogap opening temperature T^* is much higher than T_c near optimal doping, unlike structurally similar YBCO. In addition, at constant doping the pseudogap temperature does not vary with x, in contrast to T_c. This puts constraints on the nature of the pseudogap and position of the quantum critical point inside the superconducting dome.

Citations

• Continuous Quantum Phase Transitions
• Rapid change of electronic anisotropy in overdoped (Y, Ca)Ba2Cu3O7−δ
• The electronic nature of high temperature cuprate superconductors
• Magnetic analog of the isotope effect in cuprates
• Universal doping dependence of the ground-state staggered magnetization of cuprate superconductors
• Two gaps make a high-temperature superconductor?