Chapter 198 Neutron scattering studies of spin fluctuations in high-temperature superconductors

摘要: Publisher Summary This chapter describes the neutron scattering studies of spin fluctuations in CuO2 planes. The rare earths that form an important constituent almost all high-Tc materials are viewed as somewhat passive spectators. fact many candidate theories high-temperature superconductivity include a central feature mechanism for increases importance obtaining detailed picture energy, momentum, temperature, and doping dependence magnetic dynamics cuprates. Many anomalous normal-state properties doped cuprates likely related to proximity antiferromagnetism phase diagram manifestation this instability excitations. Even absence high temperature superconductivity, degree freedom quasi particles superconducting condensate, therefore probe nature transition. system close such antiferromagnetic ordering transition characterized by divergences various physical properties. Neutron can access several parameters through energy integrated cross-section or critical scattering, which is proportional Fourier transform instantaneous spin–spin correlation function.