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Explore the fundamental principles and mechanisms of unconventional superconductivity in this comprehensive physics lecture delivered by Andrey Chubukov at the BSS Physics School. Delve into the theoretical frameworks that distinguish unconventional superconductors from their conventional BCS counterparts, examining the role of strong electron correlations, magnetic fluctuations, and exotic pairing mechanisms. Learn about the various classes of unconventional superconductors including cuprates, iron-based superconductors, and heavy fermion systems, while understanding how their unique electronic structures give rise to non-s-wave pairing symmetries. Investigate the experimental signatures that characterize these materials, such as d-wave gap symmetry, pseudogap phenomena, and the interplay between superconductivity and competing orders like antiferromagnetism and charge density waves. Gain insights into the theoretical approaches used to model these complex systems, including the Hubbard model, spin fluctuation theory, and renormalization group techniques, providing a solid foundation for understanding one of the most active areas in condensed matter physics research.
