Hot-spot'Charge-Density Wave Nesting in Cuprates

摘要: Recent experiments have found evidence for at least short-range charge-density wave (CDW) order in several families of cuprates. Theories of this order fall into two categories: intermediate coupling theories where the transition involves Fermi surface nesting and coupling to a lattice distortion, and strong-coupling theories of purely electronic CDWs where the ordering vector is a form ofhot-spot'nesting associated with underlying antiferromagnetic fluctuations. Surprisingly, both models find the same nesting vectors. We will discuss ways of distinguishing the models, and of the relationship of this CDW order with the pseudogap phenomena in underdoped cuprates.