Antiferromagnetism and superconductivity are both fundamental and common states of
matter. In many strongly correlated systems, including the high-T c cuprates, the heavy …

We present the full analysis of the normal state properties of the spin-fermion model near the
antiferromagnetic instability in two dimensions. The model describes low-energy fermions …

We review recent experimental and theoretical results on the interaction between single-
particle excitations and collective spin excitations in the superconducting state of high-Tc …

Many of the physical properties of the copper oxide high-temperature superconductors
appear to defy the conventional 'one-electron'theory of metals. The development of …

Polarized and unpolarized neutron triple-axis spectrometry was used to study the dynamical
magnetic susceptibility χ ″(q, ω) as a function of energy (ħ ω) and wave vector (q) in a wide …

We report a comprehensive polarized and unpolarized neutron scattering study of the
evolution of the dynamical spin susceptibility with temperature and doping in three …

An unusual spin excitation mode observed by neutron scattering has inspired numerous
theoretical studies of the interplay between charged quasiparticles and collective spin …

We argue that the resonant peak observed in neutron scattering experiments on
superconducting cuprates and the peak/dip/hump features observed in ARPES …

An inelastic neutron scattering study of overdoped Bi 2 Sr 2 CaCu 2 O 8+ δ (T c= 83 K) has
revealed a resonant spin excitation in the superconducting state. The mode energy is E res …

Near a quantum critical point in a metal, a strong fermion-fermion interaction, mediated by a
soft boson, acts in two different directions: it destroys fermionic coherence and it gives rise to …