On the lowest energy excitations of one-dimensional strongly correlated electrons

Details On the lowest energy excitations of one-dimensional strongly correlated electrons On the lowest energy excitations of one-dimensional strongly correlated electrons

1998-03-06

arxiv.org/abs/cond-mat/9803073v6

EUROPHYSICS LETTERS,45(#3)54,1999

Physics

Condensed Matter

Strongly Correlated Electrons

6 Pages, Revtex, final version

Scientific paper

10.1209/epl/i1999-00171-0

It is proven that the lowest excitations $E_{low}(k)$ of one-dimensional half-integer spin generalized Heisenberg models and half-filled extended Hubbard models are $\pi$-periodic functions. For Hubbard models at fractional fillings $E_{low}{(k+ 2 k_f)} = E_{low}(k)$, where $2 k_f= \pi n$, and $n$ is the number of electrons per unit cell. Moreover, if one of the ground states of the system is magnetic in the thermodynamic limit, then $E_{low}(k) = 0$ for any $k$, so the spectrum is gapless at any wave vector. The last statement is true for any integer or half-integer value of the spin.

Affiliated with

Also associated with

No associations

Rating

On the lowest energy excitations of one-dimensional strongly correlated electrons 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 On the lowest energy excitations of one-dimensional strongly correlated electrons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the lowest energy excitations of one-dimensional strongly correlated electrons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-604490