First Order Transitions Between the Gapped Spin-Liquid and Ferrimagnetic Phases in \((1/2,1/2,1)\) Mixed Diamond Chains with Bond Alternation

Magnetic properties of spin-1 antiferromagnetic chains with bond alternation

Magnetic properties of spin-1 antiferromagnetic chains with bond alternation Masayuki Hagiwara,∗1,∗2,∗3 Yasuo Narumi,∗3 Koichi Kindo,∗3 Masanori Kohno,∗4 Hiroki Nakano,∗5 Ryutaro Sato,∗6 and Minoru Takahashi∗7 ∗1Magnetic Materials Laboratory, RIKEN ∗2Faculty of Integrated Science, Yokohama City University ∗3Research Center for Materials Science at Extreme Conditions, Osaka University ∗4Mitsubis...

Gapped and gapless phases of frustration-free spin-2 chains

Ferrimagnetic and Long Period Antiferromagnetic Phases in High Spin Heisenberg Chains with D-Modulation

The ground state properties of the high spin Heisenberg chains with alternating single site anisotropy are investigated by means of the numerical exact daigonaization and DMRGmethod. It is found that the ferrimagnetic state appears between the Haldane phase and period doubled Néel phase for the integer spin chains. On the other hand, the transition from the TomonagaLuttinger liquid state into t...

Gapped and gapless spin liquid phases on the Kagome lattice from chiral three-spin interactions

We argue that a relatively simple model containing only SU(2)-invariant chiral three-spin interactions on a Kagome lattice of S = 1/2 spins can give rise to both a gapped and a gapless quantum spin liquid. Our arguments are rooted in a formulation in terms of network models of edge states and are backed up by a careful numerical analysis. For a uniform choice of chirality on the lattice, we rea...

Antiferromagnetic Spin Chain with Bond Alternation

i(1 − (−1)δ)Si · Si+1 by the density matrix renormalization group method recently proposed by Steven R. White (Phys. Rev. Lett. 69 (1993) 3844). We find a massless point at δc = 0.25 ± 0.01. We also find the edge states in the region δ < δc under the open boundary condition, which disappear in the region δ > δc. At the massless point, the spin wave velocity vs is 3.66 ± 0.10 and the central cha...