Theoretical Perspectives on High-Temperature Superconductivity: Correlated Electrons, Competing Orders, and Emerging Models
Volume: 14 - Issue: 11 - Date: 01-11-2025
Approved ISSN: 2278-1412
Published Id: IJAECESTU470 | Page No.: 111-115
Author: Dr. Deepa Khatik
Co- Author: ,,,
Abstract:-High-temperature superconductivity continues to pose one of the most fundamental
challenges in condensed matter physics due to its origin in strongly correlated electronic systems
and its departure from conventional phonon-mediated superconducting mechanisms. Materials
exhibiting high superconducting transition temperatures are characterized by complex electronic
phase diagrams, unconventional pairing symmetries, and competing quantum orders. This paper
presents a comprehensive theoretical investigation of high-temperature superconductors,
emphasizing the roles of electron–electron correlations, magnetic fluctuations, quantum
criticality, and lattice effects. Classical theories such as Bardeen–Cooper–Schrieffer theory are
critically examined alongside correlated-electron models including the Hubbard and t–J
Hamiltonians. Theoretical perspectives on cuprate, iron-based, heavy-fermion, and hydrogen-rich
hydride superconductors are comparatively discussed. The study aims to synthesize modern
theoretical understanding while identifying unresolved issues and potential pathways toward
achieving stable superconductivity at elevated and ambient temperatures.
Key Words:-High-temperature superconductors, strong correlations, Hubbard model, quantum criticality, unconventional pairing, cuprates, iron-based superconductors
Area:-Engineering
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