Electron-phonon interactions, metal-insulator transitions, and holographic massive gravity

Matteo Baggioli, Oriol Pujolàs

Research output: Contribution to journalArticleResearchpeer-review

112 Citations (Scopus)


© 2015 American Physical Society. Massive gravity is holographically dual to "realistic" materials with momentum relaxation. The dual graviton potential encodes the phonon dynamics, and it allows for a much broader diversity than considered so far. We construct a simple family of isotropic and homogeneous materials that exhibit an interaction-driven metal-insulator transition. The transition relates to the formation of polarons - phonon-electron quasibound states that dominate the conductivities, shifting the spectral weight above a mass gap. We characterize the polaron gap, width, and dispersion.
Original languageEnglish
Article number251602
JournalPhysical Review Letters
Issue number25
Publication statusPublished - 23 Jun 2015


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