Affiliation:
1. Stanford University
2. Paris Observatory
3. Royal Institute of Technology (KTH)
Abstract
Bad metals have a large resistivity without being strongly
disordered. In many bad metals the Drude peak moves away from zero
frequency as the resistivity becomes large at increasing temperatures.
We catalogue the position and width of the ‘displaced Drude peak’ in the
observed optical conductivity of several families of bad metals, showing
that \omega_\text{peak} \sim \Delta \omega \sim k_BT/\hbarωpeak∼Δω∼kBT/ℏ.
This is the same quantum critical timescale that underpins the
TT-linear
dc resistivity of many of these materials. We provide a unified
theoretical description of the optical and dc transport properties of
bad metals in terms of the hydrodynamics of short range quantum critical
fluctuations of incommensurate density wave order. Within hydrodynamics,
pinned translational order is essential to obtain the nonzero frequency
peak.
Funder
FP7 People: Marie-Curie Actions
Knut och Alice Wallenbergs Stiftelse (Knut and Alice Wallenberg Foundation)
National Science Foundation
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
U.S. Department of Energy
Subject
General Physics and Astronomy
Cited by
72 articles.
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