Simultaneous dimerization and SU(4) symmetry breaking of 4-color fermions on the square lattice

Details Simultaneous dimerization and SU(4) symmetry breaking of 4-color fermions on the square lattice Simultaneous dimerization and SU(4) symmetry breaking of 4-color fermions on the square lattice

2011-08-14

arxiv.org/abs/1108.2857v3

Phys. Rev. Lett 107, 215301 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, minor changes, references added

Scientific paper

10.1103/PhysRevLett.107.215301

Using infinite projected entangled pair states (iPEPS), exact diagonalization, and flavor-wave theory, we show that the SU(4) Heisenberg model undergoes a spontaneous dimerization on the square lattice, in contrast to its SU(2) and SU(3) counterparts, which develop Neel and three-sublattice stripe-like long-range order. Since the ground state of a dimer is not a singlet for SU(4) but a 6-dimensional irrep, this leaves the door open for further symmetry breaking. We provide evidence that, unlike in SU(4) ladders, where dimers pair up to form singlet plaquettes, here the SU(4) symmetry is additionally broken, leading to a gapless spectrum in spite of the broken translational symmetry.

Affiliated with

Also associated with

No associations

Rating

Simultaneous dimerization and SU(4) symmetry breaking of 4-color fermions on the square lattice 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 Simultaneous dimerization and SU(4) symmetry breaking of 4-color fermions on the square lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous dimerization and SU(4) symmetry breaking of 4-color fermions on the square lattice will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-711997