Magnetic properties of lightly doped antiferromagnetic YBa${}_2$Cu${}_3$O${}_y$

Abstract

The present work addresses YBa${}_2$Cu${}_3$O${}_y$ at doping below x=6% where the compound is a collinear antiferromagnet. In this region YBa${}_2$Cu${}_3$O${}_y$ is a normal conductor with a finite resistivity at zero temperature. The value of the staggered magnetization at zero temperature is 0.6μ_B, the maximum value allowed by spin quantum fluctuations. The staggered magnetization is almost independent of doping. On the other hand, the Neel temperature decays very quickly from T_N=420K at x=0 to practically zero at x = 0.06. The present paper explains these remarkable properties and demonstrates that the properties result from the physics of a lightly doped Mott insulator with small hole pockets. Nuclear quadrupole resonance data are also discussed. The data shed light on mechanisms of stability of the antiferromagnetic order at x < 6%.

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• Implications of Resonant Inelastic X-ray Scattering Data for Theoretical Models of Cuprates
• ARPES Spectral Function in Lightly Doped and Antiferromagnetically Ordered YBa2Cu3O{6+y}
• Cavity-Enhanced Optical Manipulation of Antiferromagnetic Magnon-Pairs
• Nature of the spin liquid in underdoped cuprate superconductors
• Separation of magnetic and superconducting behaviour in YBCO6.33 (Tc=8.4 K)
• Longitudinal and transverse static spin fluctuations in layered ferro- and antiferromagnets