Magnetic Phase Diagram of the Hole-doped Ca$_{2-x}$Na$_{x}$CuO$_{2}$Cl$_{2}$ Cuprate Superconductor

K. Ohishi; I. Yamada; A. Koda; W. Higemoto; S. R. Saha; R. Kadono; K. M. Kojima; M. Azuma; M. Takano

doi:10.1143/JPSJ.74.2408

paper

Magnetic Phase Diagram of the Hole-doped Ca $_{2 - x}$ Na $_{x}$ CuO $_{2}$ Cl $_{2}$ Cuprate Superconductor

arXiv:cond-mat/0412313 · doi:10.1143/JPSJ.74.2408

Abstract

We report on the magnetic phase diagram of a hole-doped cuprate Ca $_{2 - x}$ Na $_{x}$ CuO $_{2}$ Cl $_{2}$ , which is free from buckling of CuO $_{2}$ planes, determined by muon spin rotation and relaxation. It is characterized by a quasi-static spin glass-like phase over a range of sodium concentration ( $0.05 \leq x \leq 0.12$ ), which is held between long range antiferromagnetic (AF) phase ( $x \leq 0.02$ ) and superconducting phase where the system is non-magnetic for $x \geq 0.15$ . The obtained phase diagram qualitatively agrees well with that commonly found for hole-doped high-\tc cuprates, strongly suggesting that the incomplete suppression of the AF order for $x > 0.02$ is an essential feature of the hole-doped cuprates.

5 pages, submitted to Phys. Rev. Lett

Magnetic Phase Diagram of the Hole-doped Ca2−x​Nax​CuO2​Cl2​ Cuprate Superconductor

Abstract

Magnetic Phase Diagram of the Hole-doped Ca $_{2 - x}$ Na $_{x}$ CuO $_{2}$ Cl $_{2}$ Cuprate Superconductor