A Proposal of an Isothermal q-EoS for Solids at High Pressures

Authors

DOI:

https://doi.org/10.13102/sscf.v20i.10804

Keywords:

Isothermal EoS, Finite Strain, High Pressure, Solids

Abstract

We present a new approach to the isothermal equation of  state for solids when subjected to high pressures. The central point lies in the fact that the solid subjected to high pressures presents non-linear elastic behavior. We show how the connection between the q-deformed finite deformation theory and the mathematical formalism of Non-Extensive Statistical Mechanics, as postulated by Tsallis [1], allows us to achieve a q-deformed equation of state. We also establish the associated q-deformed interatomic potential and discuss its relation to the Grüneisen parameter.

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Author Biographies

Álvaro Santos Alves, Physics Department (UEFS)

PhD in Physics (2011) from the Fluminense Federal University. He currently holds the position of adjunct professor at the State University of Feira de Santana. He has experience in the area of ​​Condensed Matter Physics, with an emphasis on theoretical-computational modeling of the structural, electronic and magnetic properties of molecular magnets. In addition, he also works in Experimental Physics and Physics Teaching.  He is a member of the Research Group: Physics on Campus (DFIS-UEFS).

Franz A. Farias, Physics Department (UEFS)

PhD in Sciences (Physics) (2005) from the Federal University of Rio de Janeiro. He is currently an Adjunct Professor in the Physics Department of the State University of Feira de Santana (DFIS-UEFS). He has worked in the area of ​​Physics with emphasis on General Theory of Particles and Fields, Mathematical Physics and Condensed Matter Physics, working mainly on the themes: Hamiltonian Formulation of Gauge Theories and Noncommutative Geometry and Topics in Condensed Matter Physics (Equation of State of Solids). He is a member of the Research Group: Physics on Campus (DFIS-UEFS).

Rodrigo Neves dos Santos, PhD Student at Institute of Physics (UFBA)

He was undergraduate in Physics at State University of Feira de Santana at 2017, and received his Master in Physics at Federal University from Bahia at 2019. He is a PhD student at the Graduate Program of the Physics Institute at Federal University from Bahia. He has working on DFT applied to magnetic systems with emphasis on molecular magnets. He is a member of the Research Group: Physics on Campus (DFIS-UEFS).

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Published

2024-10-21 — Updated on 2026-04-27

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How to Cite

Alves, Álvaro S., A. Farias, F., & Neves dos Santos, R. (2026). A Proposal of an Isothermal q-EoS for Solids at High Pressures. Sitientibus Physical Science Series, 20, 1–14. https://doi.org/10.13102/sscf.v20i.10804 (Original work published October 21, 2024)
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