Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional Hubbard model

Details Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional Hubbard model Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional Hubbard model

1995-12-11

arxiv.org/abs/cond-mat/9512084v1

Physics

Condensed Matter

submitted to Physical Review Letters 9 March 1995

Scientific paper

10.1103/PhysRevLett.76.1312

We present single-particle and thermodynamic properties of the half-filled single-band Hubbard model in 2D calculated in the self-consistent fluctuation exchange approximation. The low-energy excitations at moderate temperatures and small $U$ are quasiparticles with a short lifetime. As the temperature is lowered, coupling to evolving spin fluctuations leads to the extinction of these quasiparticles, signaled by a weak pseudogap in the density of states and by a positive slope in Re $\Sigma ({\bf k}_F, \varepsilon)$ and a local maximum in $|$Im $\Sigma ({\bf k}_F, \varepsilon)|$ at $\varepsilon = 0$. We explain these results using a simple spin-fluctuation model.

Affiliated with

Also associated with

No associations

Rating

Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional Hubbard 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 Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional Hubbard model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Incipient antiferromagnetism and low-energy excitations in the half-filled two-dimensional Hubbard model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-200395