RT Journal Article
T1 Universal relaxation in a holographic metallic density wave phase
A1 Amoretti, Andrea
A1 Areán Fraga, Daniel
A1 Goutéraux, Blaise
A1 Musso, Daniele
AB 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
PB American Physical Society
SN 0031-9007
YR 2019
FD 2019
LK http://hdl.handle.net/10347/21575
UL http://hdl.handle.net/10347/21575
LA eng
NO 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
NO B. G. has been partially supported during this work bythe Marie Curie International Outgoing FellowshipNo. 624054 within the 7th European CommunityFramework Programme FP7/2007-2013 and by theEuropean Research Council (ERC) under the EuropeanUnion’s Horizon 2020 research and innovation programme(Grants No. 341222 and No. 758759). D. M. is fundedby the Spanish Grants No. FPA2014-52218-P andNo. FPA2017-84436-P by Xunta de Galicia (GRC2013-024), by FEDER and by the María de Maeztu Unit ofExcellence MDM-2016-0692. D. A. is supported by the“Atracción del Talento” programme (Comunidad deMadrid) under Grant No. 2017-T1/TIC-5258 and bySevero Ochoa Programme Grants No. SEV-2016-0597and No. FPA2015-65480-P (MINECO/FEDER). D. A.and D. M. thank the FRont Of pro-Galician Scientistsfor unconditional support
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RD 27 abr 2026