arXiv subjects

J. F. Audet

Publications and source records attributed to J. F. Audet.

2 recordsLinked to original sources

arXiv1999

η-Exponents in the one dimensional antiferromagnetic Heisenberg model with next to nearest neighbour coupling

We investigate the critical exponents $η_3(α,M), η_1(α,M)$ associated with the singularities in the longitudinal and transverse structure factors of the one dimensional antiferromagnetic Heisenberg model with nearest (J_1) and next to nearest (J_2) neighbour coupling of relative strength $α= {J_2}/{J_1}$ and an external field $B$ with magnetization $M(B)$.

cond-mat↗

arXiv1997

Critical properties of 1-D spin 1/2 antiferromagnetic Heisenberg model

We discuss numerical results for the 1-D spin 1/2 antiferromagnetic Heisenberg model with next-to-nearest neighbour coupling and in the presence of an uniform magnetic field. The model develops zero frequency excitations at field dependent soft mode momenta. We compute critical quantities from finite size dependence of static structure factors.

cond-mat↗