Dilution Effects on Ordering in the ${S=1/2}$ Heisenberg Antiferromagnet on the Square Lattice
| dc.creator | Behre, J. | |
| dc.creator | Miyashita, S. | |
| dc.date | 1993-05-10 | |
| dc.date.accessioned | 2026-07-07T03:06:50Z | |
| dc.date.available | 2026-07-07T03:06:50Z | |
| dc.description | The influence of dilution with non--magnetic impurities on the order in the ground state of the $S=1/2$ Heisenberg antiferromagnet is investigated by Quantum Monte Carlo simulations. Data of the spin correlation functions and thermodynamic properties for system sizes up to $L\times L=16\times16$ and for impurity concentrations up to $δ=37.5\%$ are presented. In the low doping regime the correlation length shows similiar dependence on temperature as in the pure case. The staggered magnetization $\langle N_z^2(δ)\rangle$ in the ground state which is the order parameter of the present model is estimated by extrapolating data at low temperatures. Impurity concentration dependence of $\langle N_z^2(δ)\rangle$ is presented. $\langle N_z^2(δ)\rangle$ decreases monotonically with impurity concentration and becomes very small around $δ_c \sim 0.35$ which is much smaller than the classical percolation threshold. | |
| dc.description | 6 pages in REVTeX, including 9 figures Postscript | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9305004 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9305004 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/26959 | |
| dc.subject | Condensed Matter | |
| dc.title | Dilution Effects on Ordering in the ${S=1/2}$ Heisenberg Antiferromagnet on the Square Lattice | |
| dc.type | text |