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Gate-defined Kondo lattices with valley-helical quantum dot arrays
by Antonio L. R. Manesco
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Antonio Manesco |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2408.07148v4 (pdf) |
| Code repository: | https://doi.org/10.5281/zenodo.14334637 |
| Data repository: | https://doi.org/10.5281/zenodo.14334637 |
| Date accepted: | June 30, 2025 |
| Date submitted: | June 3, 2025, 12:46 p.m. |
| Submitted by: | Manesco, Antonio |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational, Phenomenological |
Abstract
Kondo physics and heavy-fermion behavior have been predicted and observed in moiré materials. The electric tunability of moiré materials allows an in-situ study of Kondo lattices' phase diagrams, which is not possible with their intermetallic counterparts. However, moiré platforms rely on twisting, which introduces twisting angle disorder and undesired buckling. Here we propose device layouts for one- and two-dimensional gate-defined superlattices in Bernal bilayer graphene where localized states couple to dispersive valley-helical modes. We show that, under electronic interactions, these superlattices are described by an electrically-tunable Kondo-Heisenberg model.
Author indications on fulfilling journal expectations
- Provide a novel and synergetic link between different research areas.
- Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
- Detail a groundbreaking theoretical/experimental/computational discovery
- Present a breakthrough on a previously-identified and long-standing research stumbling block
Author comments upon resubmission
The summary of the main revisions is in the list of changes below.
List of changes
- Added an appendix showing that a split gate setup also works as a valley filter.
- Estimated the scaling of the low-energy model parameters from changes in the microscopic parameters to address the device tunability.
- Highlighted that short-range disorder is detrimental to the proposal, and mentioned that electrostatic screening suppresses it.
- Referred to a previous work where we detail the construction of the tight-binding model and develop and demonstrate the scaling used to simulate devices with hundreds of nanometers.
- Expanded on the explanation of the minimal model.
- Added references deriving an effective SU(4) Kondo Hamiltonian in graphene and nanotubes.
- Fixed typos.
Published as SciPost Phys. 19, 024 (2025)
Reports on this Submission
Report #3 by Anonymous (Referee 3) on 2025-6-17 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2408.07148v4, delivered 2025-06-17, doi: 10.21468/SciPost.Report.11420
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