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

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

1997-02-03

arxiv.org/abs/cond-mat/9702026v1

Lecture Notes in Physics 494(1997)41

Physics

Condensed Matter

talk given by H. Kr{\"o}ger at Heraeus Seminar Theory of Spin Lattices and Lattice Gauge Models, Bad Honnef (1996), 20 pages,

Scientific paper

10.1007/BFb0104302

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.

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