A unified phase transition picture of the charged topological black hole in Horava-Lifshitz gravity

Abstract

Aiming at a unified phase transition picture of the charged topological black hole in Hořava-Lifshitz gravity, we investigate this issue not only in canonical ensemble with the fixed charge case but also in grand-canonical ensemble with the fixed potential case. We firstly perform the standard analysis of the specific heat, the free energy and the Gibbs potential, and then study its geometrothermodynamics. It is shown that the local phase transition points not only witness the divergence of the specific heat, but also witness the minimum temperature and the maximum free energy or Gibbs potential. They also witness the divergence of the corresponding thermodynamic scalar curvature. No matter which ensemble is chosen, the metric constructed can successfully produce the behavior of the thermodynamic interaction and phase transition structure while other metrics failed to predict the phase transition point of the charged topological black hole in former literature. In grand-canonical ensemble, we have discovered the phase transition which has not been reported before. It is similar to the canonical ensemble in which the phase transition only takes place when $k=-1$. But it also has its unique characteristics that the location of the phase transition point depends on the value of potential, which is different from the canonical ensemble where the phase transition point is independent of the parameters. After an analytical check of Ehrenfest scheme, we find that the new phase transition is a second order one. It is also found that the thermodynamics of the black hole in Horava-Lifshitz gravity is quite different from that in Einstein gravity.

24pages,11figures

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• Effects of dark energy on P-V criticality of charged AdS black holes
• Critical behavior of charged Gauss-Bonnet AdS black holes in the grand canonical ensemble
• Peculiar $P-V$ criticality of topological Hořava-Lifshitz black holes
• Ehrenfest scheme for complex thermodynamic systems in full phase space
• Thermodynamic instability of topological black holes in Gauss-Bonnet gravity with a generalized electrodynamics
• Phantom black holes and critical phenomena
• Non-extended phase space thermodynamics of Lovelock AdS black holes in grand canonical ensemble
• Thermodynamic Volume of Cosmological Solitons