1207.1059 (Shunsuke Furukawa et al.)

Ground-state phase diagram of a spin-1/2 frustrated ferromagnetic XXZ
chain: Haldane dimer phase and gapped/gapless chiral phases    [PDF]

Shunsuke Furukawa, Masahiro Sato, Shigeki Onoda, Akira Furusaki

The ground-state phase diagram of a spin-1/2 XXZ chain with competing ferromagnetic nearest-neighbor (J_1<0) and antiferromagnetic second-neighbor (J_2>0) exchange couplings is studied by means of the infinite time evolving block decimation algorithm and effective field theories. For the SU(2)-symmetric (Heisenberg) case, we show that the nonmagnetic phase in the range -4View original: http://arxiv.org/abs/1207.1059