EPR studies of the triangular-lattice antiferromagnet Cs2CuBr4

Nuclearmagnetic relaxation of Cs of distorted triangular antiferromagnet Cs2CuBr4

A quasi-two dimensional antiferromagnet Cs2CuBr4 is characterized as a frustrated spin system on a distorted triangular lattice. Cs-NMR experiments on Cs2CuBr4 have been performed in the range of the magnetic field applied along b-axis up to 15.9 T, which covers the field range for the 1/3 magnetization plateau. Field dependence of T−1 1 at 0.5 K shows a hysteresis around each end of the platea...

Heisenberg Antiferromagnet on a Triangular Lattice

A Spin-Polaron Technique Utilized on Triangular-Lattice Antiferromagnet

By expressing the Holstein-Primakoff transformation in a symmetric form a modified spin-polaron technique utilized on triangular-lattice antiferromagnet is developed. With the technique, we have treated an extended t-J model, calculated the quasiparticle dispersion, and we also compared the the dispersion with that obtained by other method. PACS: 74.20.-z, 71.27.+a, 75.30.Gw

Charge and Magnetic Orderings in Triangular Lattice Antiferromagnet InFe2O4

InFe2O4 belongs to the RFe2O4 family where R is trivalent cation (R = In, Yb, Lu, Er, or Y). In the rhombohedral crystal structure of this compound as shown in Fig. 1, the double layers of FeO5 bipyramids make two-dimensional triangular lattices and are separated by RO6 octahedra. Since the numbers of Fe and Fe ions are equal in the triangular lattice, the coexistence of charge and magnetic fru...

Variational studies of triangular Heisenberg antiferromagnet in magnetic field

We present a variational study of the Heisenberg antiferromagnet on the spatially anisotropic triangular lattice in magnetic field. First we construct a simple yet accurate wave function for the 1/3-magnetization plateau uud phase on the isotropic lattice. Beginning with this state, we obtain natural extensions to nearby commensurate coplanar phases on either side of the plateau. The latter occ...