Thermodynamic behavior and phase transitions of black holes with a cloud of strings and perfect fluid dark matter
Singh D.V. Upadhyay S. Myrzakulov Y. Myrzakulov K. Singh B. Kumar M.
July 2025Elsevier B.V.
Nuclear Physics B
2025#1016
This paper presents an exact black hole solution within a cloud of strings (CoS) and a perfect fluid dark matter (PFDM) field. The derived black hole solution interpolates between the AdS-charged Letelier black hole in the absence of the PFDM field and the AdS Reissner-Nordström black hole in the limiting case of the PFDM and CoS parameters. The thermodynamic properties of the black hole, including temperature, entropy, heat, and free energy, are modified in the presence of the PFDM field and CoS parameter. Furthermore, we investigate the black holes critical points and phase structure in an extended phase space. We find that the critical temperature and pressure decrease with the CoS parameter but increase with the PFDM field. The Gibbs free energy versus temperature plot reveals a swallow-tail behavior, indicating a first-order phase transition, which terminates at a second-order phase transition.
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Department of Physics, Institute of Applied Science and Humanities, GLA University, Mathura, 281406, India
Department of Physics, K.L.S. College, Nawada, Magadh University, Bihar, Bodh Gaya, 805110, India
School of Physics, Damghan University, P.O. Box 3671641167, Damghan, Iran
Department of General & Theoretical Physics, L. N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Department of Physics, Atma Ram Sanatan Dharma College, University of Delhi, Delhi, 110021, India
Atma Ram Sanatan Dharma College, University of Delhi, Delhi, 110021, India
Department of Physics
Department of Physics
School of Physics
Department of General & Theoretical Physics
Department of Physics
Atma Ram Sanatan Dharma College
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