Self-energy renormalization around the flux phase in the t-J model: Possible implications in underdoped cuprates

ANDRES GRECO

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

The American Physical Society

Año: 2008 vol. 77 p. 92503 - 92507

0163-1829

The flux phase predicted by the t-J model in the large-N limit exhibits features that make it a candidate fordescribing the pseudogap regime of cuprates. However, certain properties, such as, for instance, the predictionof well-defined quasiparticle peaks, speak against this scenario. We have addressed these issues by computingself-energy renormalizations in the vicinity of flux phase. The calculated spectral functions show featuressimilar to those observed in experiments. At low doping, near the flux phase, the spectral functions areanisotropic on the Fermi surface and very incoherent near the hot spots. The temperature and doping evolutionof self-energy and spectral functions are discussed and compared with the experiment.