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Evolution of the Berry curvature dipole in uniaxially strained bilayer graphene
by Karel Cuypers, Robin Smeyers, Bert Jorissen, Lucian Covaci
Submission summary
| Authors (as registered SciPost users): | Lucian Covaci |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2601.05962v1 (pdf) |
| Date submitted: | Jan. 12, 2026, 9:33 a.m. |
| Submitted by: | Lucian Covaci |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
While in pristine bilayer graphene the Berry curvature dipole (BCD), a necessary ingredient for the nonlinear anomalous Hall effect, is zero, uniaxial strain can give rise to finite BCD. We investigate this by using a tight-binding (TB) approach build on the Slater-Koster parameterization to capture lattice deformation effects often missed by continuum models. We demonstrate that the BCD's evolution with strain and doping is highly sensitive to the choice in parameterization, particularly when including the longer range interlayer skew hoppings. Additionally, out-of-plane compression enhances the response by broadening the Dirac cones. These findings benchmark low-energy continuum models and highlight the necessity of realistic tight-binding models for accurately predicting strain-engineered Hall effects in bilayer graphene.