Coupling between a Weyl semimetal and a nontopological metal
Bibliographic record
Abstract
We study the effects of tunneling between a Weyl semimetal (WSM) and a simple parabolic band. When coupled to the nonmagnetic parabolic band, the interface between the two exhibits two main phenomena. First, the WSM's chiral arc state lowers in energy, and second, a previously extended WSM state becomes localized to the interface and is lowered in energy. Together these surface bound states create a new closed orbit in momentum space, and a noticeable spin-dependent asymmetry in the interface spectrum in the vicinity of the Weyl nodes appears. We study these effects with a lattice model that we solve numerically on a finite sample and analytically using an Ansatz on an infinite sample. Our Ansatz agrees very well with the numerical simulation as it accurately describes the behavior of the chiral state, from its energy asymmetry to the spin rotation at the interface. We find that the tunneling effectively increases the Fermi arc length, allowing for the presence of interface states beyond the bare Weyl nodes. These additional states may carry current along the interface, and their contribution can be detected in the conductance. In addition to conductivity, the effect of tunneling between the WSM and the metal can be seen in quantum oscillation experiments, which we briefly address.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".