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


Cvitanić, Tonči; Pelc, Damjan; Požek, Miroslav; Amit, Eran; Keren, Amit
O-17-NMR Knight shift study of the interplay between superconductivity and pseudogap in (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy // Physical Review B - Condensed Matter and Materials Physics, 90 (2014), 5; 054508-1 doi:10.1103/PhysRevB.90.054508 (međunarodna recenzija, članak, znanstveni)


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

Autori
Cvitanić, Tonči ; Pelc, Damjan ; Požek, Miroslav ; Amit, Eran ; Keren, Amit

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 90 (2014), 5; 054508-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Superconductivity; cuprates; pseudogap; NMR

Sažetak
We report systematic 17O-NMR measurements on the high-Tc cuprate (Ca_xLa_{; ; ; ; ; 1-x}; ; ; ; ; )(Ba_{; ; ; ; ; 1.75 - x}; ; ; ; ; La_{; ; ; ; ; 0.25 + x}; ; ; ; ; )Cu_3O_y, for four different families (different x). Using Knight shift data, we show that the pseudogap lines for all families are inconsistent with a quantum critical point inside the superconducting dome. In addition, at constant doping the pseudogap temperature does not vary with x, in contrast to Tc. We therefore argue that pseudogap and superconductivity are separate phenomena in these cuprates. 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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-2729 - Lokalna proba i mezoskopska dinamika u novim fazama jako koreliranih elektronskih sustava (Miroslav Požek, )

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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