Ionization/dissociation-driven first order phase transitions: on a new class of first order phase transitions

2025/09/01 by G. É. Norman, Norman, Genri, И. М. Саитов +1
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Plasma Physics (physics.plasm-ph) #Spectroscopy and Quantum Chemical Studies

paper · pdf · doi:10.48550/arxiv.2509.01273

openalex publication_date 2025/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this work, we compare various models for describing the phase transition of the fluid hydrogen into a conducting state, including both chemical models of plasma and first-principle simulations within the framework of the density functional theory (DFT). The comparison of the results indicates the plasma nature of the phase transition in warm dense hydrogen. We propose a concept of a new class of first-order phase transitions: ionization or dissociation-driven phase transitions, with which the plasma phase transition in fluid hydrogen can be associated.

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