Pseudogaps and magnetic properties of the two-dimensional t-J model

Details Pseudogaps and magnetic properties of the two-dimensional t-J model Pseudogaps and magnetic properties of the two-dimensional t-J model

1998-08-08

arxiv.org/abs/cond-mat/9808087v1

Physics

Condensed Matter

Strongly Correlated Electrons

25 pages, 12 Postscript figures, uses psfig.sty

Scientific paper

We apply the modified spin-wave theory with the constraint of zero staggered magnetization to investigate normal-state spectral and magnetic properties of the 2D t-J model in the paramagnetic state. A set of self-energy equations for hole and magnon Green's functions is solved numerically in the self-consistent Born approximation. The constraint can be fulfilled in the ranges of hole concentrations 0.02 < x < 0.17 and temperatures T < 150 K. In this region the hole spectrum differs from a conventional metallic spectrum which is manifested in the variation with x of the quasiparticle weights of states and in the violation of Luttinger's theorem. With decreasing x from x = 0.17 hidden parts appear in the hole Fermi surface which can be interpreted as the opening of a pseudogap near (pi,0). Obtained size, symmetry and concentration dependence of the pseudogap are in agreement with photoemission data in Bi2212. Calculated temperature dependencies of the spin correlation length, spin-lattice relaxation times at the Cu and O sites, and static susceptibility are typical for the quantum disordered regime with a pseudogap in the spectrum of magnetic excitations. These quantities are in qualitative and in some cases in quantitative agreement with experiment in underdoped YBa2Cu3O(6+y). At x > 0.12 the considered phase borders the phase of conventional metal.

Affiliated with

Also associated with

No associations

Rating

Pseudogaps and magnetic properties of the two-dimensional t-J model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Pseudogaps and magnetic properties of the two-dimensional t-J model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pseudogaps and magnetic properties of the two-dimensional t-J model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-528527