Existence of Low-Temperature Critical Regime in 1D Luttinger Liquid with a Weak Link

Details Existence of Low-Temperature Critical Regime in 1D Luttinger Liquid with a Weak Link Existence of Low-Temperature Critical Regime in 1D Luttinger Liquid with a Weak Link

1995-02-06

arxiv.org/abs/cond-mat/9502022v1

Physics

Condensed Matter

6 pages, latex, no figures

Scientific paper

10.1088/0305-4470/28/23/005

The exact solution of the boundary sine-Gordon model is studied in the region where the scaling dimension of the boundary field $1 < \Delta < 1$. It is shown that at $\Delta > 2/3$ the infrared fixed point belongs to the universality class of the underscreened anisotropic Kondo model. The boundary contribution to the specific heat scales as $C \sim T^{2\Delta^{-1} - 2}$ at small temperatures.

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