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Updated: Sep 29, 2025
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.6K
Non-Fermi liquid phase and linear-in-temperature scattering rate in overdoped two-dimensional Hubbard model
Wéi Wú1, Xiang Wang1, André-Marie Tremblay2
1School of Physics, Sun Yat-sen University, Guangzhou, 510275, Guangdong, China.
Summary
Strange metallicity in cuprates, characterized by a T-linear scattering rate, can arise from the overdoped Hubbard model. Antiferromagnetic fluctuations are identified as the microscopic origin, challenging the Planckian limit.
Area of Science:
- Condensed matter physics
- Quantum materials science
Background:
- Most metals exhibit electron-scattering rates following T-squared at low temperatures per Fermi liquid theory.
- Overdoped cuprate superconductors show anomalous T-linear scattering rates, approaching a Planckian limit.
Purpose of the Study:
- Investigate the emergence of T-linear scattering rates in the overdoped Hubbard model.
- Identify the microscopic mechanism behind strange metallicity in cuprates.
Main Methods:
- Utilized advanced computational approaches.
- Analyzed the overdoped Hubbard model at low temperatures.
Main Results:
- Demonstrated that T-linear scattering rates can emerge from the overdoped Hubbard model.
- Results align with cuprate experiments but question the Planckian limit.
- Identified antiferromagnetic fluctuations as the source of T-linear scattering.
Conclusions:
- Antiferromagnetic fluctuations provide the microscopic mechanism for strange metallicity in cuprates.
- The Hubbard model offers a viable framework for understanding this phenomenon.
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