Pseudogap in underdoped cuprates and spin-density-wave fluctuations
Pseudogap in underdoped cuprates and spin-density-wave fluctuations
We analyze fermionic spectral function in the spin-density-wave (SDW) phase of quasi-two-dimensional (quasi-2D) cuprates at small but finite $T$. We use a nonperturbative approach and sum up infinite series of thermal self-energy terms, keeping at each order nearly divergent $(T/J)|\text{log}\text{ }ϵ|$ terms, where $ϵ$ is a deviation from a pure …