Theory of electrons with orbital degeneracy

Details Theory of electrons with orbital degeneracy Theory of electrons with orbital degeneracy

1999-11-12

arxiv.org/abs/cond-mat/9911192v3

Phys.Rev. B62 (2000) 15493-15498

Physics

Condensed Matter

Strongly Correlated Electrons

Extended PRB version, 6 pages, symmetry breaking added

Scientific paper

10.1103/PhysRevB.62.15493

The Hubbard model for electrons with orbital degeneracy is shown to have an underlying SU_d(4) symmetry of spin-orbital double. A hidden charge SU_c(4) symmetry is exposed and an extended Lieb-Mattis transformation which maps these two symmetries into each other is given. On the basis of elementary degenerate perturbative theory, it is shown that the system with strong repulsive coupling is equivalent to a SO(6) Heisenberg magnet at half-filling and a SU(4) one at quarter-filling. The band is half-filled at all temperature for $\mu=3U/2$. The features of ground state and low-lying excitations in one dimension are indicated according to exact solutions. Various possibilities of symmetry breaking are also given.

Affiliated with

Also associated with

No associations

Rating

Theory of electrons with orbital degeneracy 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 Theory of electrons with orbital degeneracy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theory of electrons with orbital degeneracy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-196042