Zobrazeno 1 - 10
of 476
pro vyhledávání: '"Goetze, O"'
Publikováno v:
Phys. Rev. B 106, 094431 (2022)
We study the nearest-neighbor Heisenberg antiferromagnet on a face-centered cubic lattice with arbitrary spin S. The model exhibits degenerate classical ground states including two collinear structures AF1 and AF3 described by different propagation v
Externí odkaz:
http://arxiv.org/abs/2206.12102
Publikováno v:
Phys. Rev. B 100 (2019), 024401
The zero-temperature phase diagram of the spin-$\frac{1}{2}$ $J_{1}$--$J_{2}$--$J_{1}^{\perp}$ model on an $AA$-stacked square-lattice bilayer is studied using the coupled cluster method implemented to very high orders. Both nearest-neighbor (NN) and
Externí odkaz:
http://arxiv.org/abs/1905.03562
Publikováno v:
Phys. Rev. B 98 (2018), 224402
The interplay between lattice topology, frustration, and spin quantum number, $s$, is explored for the Heisenberg antiferromagnet (HAFM) on the eleven two-dimensional Archimedean lattices (square, honeycomb, CaVO, SHD, SrCuBO, triangle, bounce, trell
Externí odkaz:
http://arxiv.org/abs/1811.04229
Ground-State Ordering of the $J_1$--$J_2$ Model on the Simple Cubic and Body-Centered Cubic Lattices
Publikováno v:
Phys. Rev. B 93, 235123 (2016)
The $J_1$--$J_2$ Heisenberg model is a "canonical" model in the field of quantum magnetism in order to study the interplay between frustration and quantum fluctuations as well as quantum phase transitions driven by frustration. Here we apply the Coup
Externí odkaz:
http://arxiv.org/abs/1606.00388
Publikováno v:
Journal of Magnetism and Magnetic Materials 397, 333-341 (2016)
We apply the coupled cluster method to high orders of approximation and exact diagonalizations to study the ground-state properties of the triangular-lattice spin-$s$ Heisenberg antiferromagnet. We calculate the fundamental ground-state quantities, n
Externí odkaz:
http://arxiv.org/abs/1508.06254
Publikováno v:
Phys. Rev. B 92, 224434 (2015)
We use the coupled cluster method implemented to high orders of approximation to investigate the frustrated spin-$\frac{1}{2}$ $J_{1}$--$J_{2}$--$J_{3}$ antiferromagnet on the honeycomb lattice with isotropic Heisenberg interactions of strength $J_{1
Externí odkaz:
http://arxiv.org/abs/1504.02275
Autor:
Götze, O., Richter, J.
Publikováno v:
Phys. Rev. B 91, 104402 (2015)
We use the coupled cluster method to high orders of approximation in order to calculate the ground-state phase diagram of the XXZ spin-$s$ kagome antiferromagnet with easy-plane anisotropy, i.e. the anisotropy parameter $\Delta$ varies between $\Delt
Externí odkaz:
http://arxiv.org/abs/1501.02146
Publikováno v:
Phys. Rev. B 89 (2014) 184407 (7pp)
We investigate ground states of $s$=1/2 Heisenberg antiferromagnets on the eleven two-dimensional (2D) Archimedian lattices by using the coupled cluster method. Magnetic interactions and quantum fluctuations play against each other subtly in 2D quant
Externí odkaz:
http://arxiv.org/abs/1312.1203
Publikováno v:
J. Phys. Soc. Jpn. 82, 015002 (2013)
We apply the coupled cluster method and exact diagonalzation to study the uniform susceptibility and the ground-state magnetization curve of the triangular-lattice spin-1 Heisenberg antiferromagnet. Comparing our theoretical data for the magnetizatio
Externí odkaz:
http://arxiv.org/abs/1210.7594
Publikováno v:
Phys. Rev. B 87, 054412 (2013)
We calculate the temperature dependence of the correlation length xi and the uniform susceptibility chi_0 of the frustrated J1-J2 square-lattice Heisenberg ferromagnet in the collinear stripe phase using Green-function technique. The height chi_{max}
Externí odkaz:
http://arxiv.org/abs/1210.4414