Journal
PHYSICS LETTERS B
Volume 730, Issue -, Pages 111-114Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2014.01.036
Keywords
P-V criticality; AdS black holes; Ehrenfest equations
Funding
- Thousand Hundred Ten project of Guangdong Province of China
- Natural Science Foundation of Zhanjiang Normal University [QL1104]
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In this Letter, we explore another novel Ehrenfest scheme which can also be utilized in the P-V criticality research of RN-AdS black holes. The novel form of Ehrenfest scheme is neither the one in classical thermodynamics nor the analogy one proposed for grand-canonical ensemble in literatures. After a detailed derivation of the novel Ehrenfest equations, an analytical check is carried out at the critical point of P-V criticality of RN-AdS black holes. It is shown once again that the phase transition at the critical point is a second order one. Both the novel Ehrenfest scheme developed in this Letter and the classical Ehrenfest equations utilized in our former research can be applied to investigate the nature of phase transition at the critical point of P-V criticality of AdS black holes. (C) 2014 The Authors. Published by Elsevier B.V.
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