Universal relaxation in a holographic metallic density wave phase
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Título: | Universal relaxation in a holographic metallic density wave phase |
Autor/a: | Amoretti, Andrea Areán Fraga, Daniel Goutéraux, Blaise Musso, Daniele |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
Data: | 2019 |
Editor: | American Physical Society |
Cita bibliográfica: | Amoretti, A., Areán, D., Goutéraux, B., & Musso, D. (2019). Universal relaxation in a holographic metallic density wave phase. Physical Review Letters, 123(21). doi: 10.1103/physrevlett.123.211602 |
Resumo: | In this Letter, we uncover a universal relaxation mechanism of pinned density waves, combining gauge-gravity duality and effective field theory techniques. Upon breaking translations spontaneously, new gapless collective modes emerge, the Nambu-Goldstone bosons of broken translations. When translations are also weakly broken (e.g., by disorder or lattice effects), these phonons are pinned with a mass m and damped at a rate Ω, which we explicitly compute. This contribution to Ω is distinct from that of topological defects. We show that Ω≃Gm(2)Ξ, where G is the shear modulus and Ξ is related to a diffusivity of the purely spontaneous state. This result follows from the smallness of the bulk and shear moduli, as would be the case in a phase with fluctuating translational order. At low temperatures, the collective modes relax quickly into the heat current, so that late time transport is dominated by the thermal diffusivity. In this regime, the resistivity in our model is linear in temperature and the ac conductivity displays a significant rearranging of the degrees of freedom, as spectral weight is shifted from an off-axis, pinning peak to a Drude-like peak. These results could shed light on transport properties in cuprate high T(c) superconductors, where quantum critical behavior and translational order occur over large parts of the phase diagram and transport shows qualitatively similar features |
Versión do editor: | https://doi.org/10.1103/PhysRevLett.123.211602 |
URI: | http://hdl.handle.net/10347/21575 |
DOI: | 10.1103/PhysRevLett.123.211602 |
ISSN: | 0031-9007 |
E-ISSN: | 1079-7114 |
Dereitos: | © The Author(s) 2019. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI |
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© The Author(s) 2019. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI
© The Author(s) 2019. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI