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arXiv · 1806.08346

Strange metallicity in the doped Hubbard model

Edwin W. Huang·Ryan Sheppard·Brian Moritz·Thomas P. Devereaux
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Abstract

Strange or bad metallic transport, defined by its incompatibility with conventional quasiparticle pictures, is a theme common to strongly correlated materials and ubiquitous in many high temperature superconductors. The Hubbard model represents a minimal starting point for modeling strongly correlated systems. Here we demonstrate strange metallic transport in the doped two-dimensional Hubbard model using determinantal quantum Monte Carlo calculations. Over a wide range of doping, we observe resistivities exceeding the Mott-Ioffe-Regel limit with linear temperature dependence. The temperatures of our calculations extend to as low as 1/40 the non-interacting bandwidth, placing our findings in the degenerate regime relevant to experimental observations of strange metallicity. Our results provide a foundation for connecting theories of strange metals to models of strongly correlated materials.

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Edwin W. Huang, Ryan Sheppard, Brian Moritz, Thomas P. Devereaux. 2018-06-21. Strange metallicity in the doped Hubbard model. https://doi.org/10.1126/science.aau7063

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