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Updated: May 12, 2026
13:56
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Local electronic nematicity in the two-dimensional one-band Hubbard model
Kun Fang1, G W Fernando, A N Kocharian
1Department of Physics, University of Connecticut, Storrs, CT 06269, USA.
Summary
Electronic nematicity, a property seen in liquid crystals, is now observed in strongly correlated materials like cuprate superconductors. This study supports experimental findings of local rotational symmetry breaking in the Hubbard model.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Nematicity, a property of liquid crystals, is relevant to strongly interacting electron systems.
- An electronic nematic phase is observed in the pseudogap phase of cuprate superconductors.
- Recent experiments show local nematic properties in high Tc superconductors even with symmetric lattices.
Purpose of the Study:
- To investigate electronic nematicity in the two-dimensional one-band Hubbard model.
- To provide theoretical support for experimental observations of local C4 symmetry breaking.
- To explore the relationship between Coulomb interaction, nematicity, and stripe phases.
Main Methods:
- Utilizing the variational cluster approach.
- Studying the two-dimensional one-band Hubbard model.
- Analyzing spin correlation functions in momentum space.
Main Results:
- Demonstrated the possibility of an electronic nematic state within the Hubbard model.
- Identified the nematic phase in the overdoped region.
- Observed that local nematicity decreases with increasing electron filling.
- Indicated that strong Coulomb interaction can lead to stripe-like phases.
- Showcased the impact of real-space nematicity on spin correlations.
Conclusions:
- The Hubbard model supports experimental findings on local rotational symmetry breaking.
- Electronic nematicity is a viable phenomenon in strongly correlated systems.
- Coulomb interactions play a crucial role in driving nematic and stripe phases.
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