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

Scientific paper - Original scientific paper

• Author: Tonči Cvitanić
• Author: Damjan Pelc
• Author: Miroslav Požek
• Author: E. Amit
• Author: A. Keren
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We report systematic 17O-NMR measurements on the high-Tc cuprate (Ca_xLa_1−x )(Ba_1.75−xLa_0.25+x )Cu_3O_y , for four different families (different x). Using Knight shift data, we show that the pseudogap opening temperature T ∗ is much higher than Tc near optimal doping, unlike structurally similar YBCO. In addition, at constant doping the pseudogap temperature does not vary with x, in contrast to Tc. This puts constraints on the nature of the pseudogap and position of the quantum critical point inside the superconducting dome.

• Keywords (english): superconductivity; cuprates; pseudogap; NMR
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical review B: Condensed matter and materials physics
• Numbering: vol. 90, no. 5, 054508
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.90.054508
• URN:NBN: urn:nbn:hr:217:822233
• Publication: 2014
• Document URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.054508
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2014) by the American Physical Society. Received 24 March 2014; revised manuscript received 21 July 2014; published 12 August 2014.
• Created on: 2019-12-02 19:50:59