Magnetic moment of a spinon and thermodynamic properties of the one-dimensional Heisenberg model
Physical review. B, Condensed matter1998Vol. 58(1), pp. 62–64
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Abstract
The one-dimensional spin-$\frac{1}{2}$ Heisenberg antiferromagnet is considered using a simple quasiparticle picture: a weakly interacting Fermi gas of kinks. Using this picture, the low-temperature heat capacity, and the magnetic susceptibility with logarithmic field and temperature corrections are derived. The results obtained are in agreement with previous Bethe ansatz and conformal field-theory calculations. We demonstrate from comparison with previous calculations that the magnetic moment of the kink ${g}_{\mathrm{kink}}=\sqrt{2}{g}_{\mathrm{electron}}.$
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