Repulsive interactions in the microstructure of regular Hayward black hole in anti-de Sitter spacetime

Abstract

We study the interaction between the microstructures of Hayward-AdS black hole using Ruppeiner geometry. Our investigation shows that the dominant interaction between the black hole molecules is attractive in most part of the parametric space of temperature and volume, as in van der Waals system. However, in contrast to the van der Waals fluid, there exists a weak dominant repulsive interaction for small black hole phase in some parameter range. This result clearly distinguishes the interactions in a magnetically charged black hole from that of van der Waals fluid. However, these sort of interactions are characteristic for charged black holes since they do not dependent on magnetic charge or temperature.

Keywords

• Black hole thermodynamics
• Hayward-AdS black hole
• Extended phase space
• Ruppeiner geometry
• Black hole microstructure
• Repulsive interactions