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Strange metallicity in the doped Hubbard model
Edwin W Huang1,2, Ryan Sheppard3, Brian Moritz2
1Department of Physics, Stanford University, Stanford, CA 94305, USA. edwinwhuang@gmail.com tpd@stanford.edu.
Science (New York, N.Y.)
|November 23, 2019
Summary
Researchers observed strange metallic transport in the doped Hubbard model, a key system for understanding correlated materials. This finding, seen in simulations, helps explain unusual electrical properties in materials like superconductors.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Strange or bad metallic transport is observed in strongly correlated materials, including high-temperature superconductors.
- The Hubbard model is a fundamental model for studying strongly correlated systems.
Purpose of the Study:
- To investigate strange metallic transport in the doped two-dimensional Hubbard model.
- To connect theories of strange metals to strongly correlated material models.
Main Methods:
- Determinantal quantum Monte Carlo calculations were employed.
- Simulations covered a wide range of doping levels.
- Temperatures reached the degenerate regime (1/40 of noninteracting bandwidth).
Main Results:
- Strange metallic transport was observed in the doped two-dimensional Hubbard model.
- Resistivities exceeded the Mott-Ioffe-Regel limit across various doping levels.
- A linear temperature dependence of resistivity was identified.
Conclusions:
- The study demonstrates strange metallic behavior in a minimal model for strongly correlated systems.
- Findings are relevant to experimental observations of strange metallicity.
- Results provide a basis for linking strange metal theories with correlated material models.
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