Study on Pressure-Induced Magnetic Phase Transitions in Graphene Analogues
DOI:
https://doi.org/10.53573/rhimrj.2025.v12n8.015Keywords:
Graphene analogues, Pressure-induced phase transition, Two-dimensional magnetism, Magnetic metal, Insulator-to-metal transition, Spin–charge couplingAbstract
In this research paper, we explained the role of pressure as an effective external control parameter for inducing magnetic phase transitions in graphene analogues. Two-dimensional graphene-like materials exhibit rich electronic and magnetic behavior due to reduced dimensionality and strong electron correlations, making them ideal platforms for exploring emergent quantum phenomena. Using high-pressure experimental techniques combined with electronic and magnetic characterization, the structural, electronic, and magnetic responses of selected van der Waals materials were systematically investigated over a wide pressure range. The results reveal that increasing pressure leads to significant lattice compression and enhanced orbital overlap, which drives an insulator-to-metal transition through bandwidth broadening and reduction of electronic correlations. Remarkably, contrary to conventional expectations, long-range magnetic order persists even in the metallic state. Instead of collapsing, magnetism evolves into a modified high-pressure magnetic phase characterized by reduced yet robust magnetic moments and altered exchange interactions. This coexistence of metallic conductivity and magnetism signifies the emergence of an unconventional magnetic metal. The study highlights the crucial interplay between charge and spin degrees of freedom under pressure and suggests that the observed magnetic metallic phase may serve as a precursor to unconventional superconductivity. These findings provide new insights into pressure-tuned quantum states in two-dimensional materials and offer promising directions for designing next-generation spintronic and quantum devices.
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