Thermodynamic instability of charged dilaton black holes in AdS spaces

Details Thermodynamic instability of charged dilaton black holes in AdS spaces Thermodynamic instability of charged dilaton black holes in AdS spaces

2009-12-21

arxiv.org/abs/0912.4199v2

Phys.Rev.D81:084040,2010

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 6 figures

Scientific paper

10.1103/PhysRevD.81.084040

We study thermodynamic instability of a class of $(n+1)$-dimensional charged dilaton black holes in the background of anti-de Sitter universe. We calculate the quasilocal mass of the AdS dilaton black hole through the use of the subtraction method of Brown and York. We find a Smarr-type formula and perform a stability analysis in the canonical ensemble and disclose the effect of the dilaton field on the thermal stability of the solutions. Our study shows that the solutions are thermally stable for small $\alpha$, while for large $\alpha$ the system has an unstable phase, where $\alpha $ is a coupling constant between the dilaton and matter field.

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