Work

Persistence of the Superconducting Condensate Far above the Critical Temperature of YBa2(Cu,Zn)3Oy Revealed by c -Axis Optical Conductivity Measurements for Several Zn Concentrations and Carrier Doping Levels

Year: 2014

Type: article

Abstract: The superconductivity precursor phenomena in high temperature cuprate superconductors is studied by direct measurements of the superconducting condensate with the use of the c-axis optical conductivity of YBa2(Cu1-xZnx)3Oy for several doping levels (p) as well as for several Zn concentrations. Both the real and imaginary parts of the optical conductivity clearly show that the superconducting carriers persist up to the high temperatures Tp that is higher than the critical temperature Tc but lower than the pseudogap temperature T*. Tp increases with reducing doping level like T*, but decreases with Zn substitution unlike T*.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.112.127003

Authors: Ece Uykur, Kiyohisa Tanaka, Takahiko Masui, Shigeki Miyasaka, Setsuko Tajima

Institution: The University of Osaka

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science

Awards: G2116046390, Control of spin/orbital degrees of freedom and study of critical behavior in 1-dimensional triangle lattice system, G4450897283, Pseudogap and superconducting gap in high temperature superconducting copper oxides