Thermodynamics, geometrothermodynamics and critical behavior of (2+1)-dimensional black holes

Abstract

In this paper, we study the properties of the (2+1)-dimensional black holes from the viewpoint of geometrothermodynamics. We show that the Legendre invariant metric of the (2+1)-dimensional black holes can produce correctly the behavior of the thermodynamic interaction and phase transition structure of the corresponding black hole configurations. We find that they are both curved and the curvature scalar gives the information about the phase transition point.

Accepted by PLB. arXiv admin note: text overlap with arXiv:0811.2524, arXiv:0902.4488, arXiv:0805.3003 by other authors

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