Absorption of circular polarized light in tilted type-I and type-II Weyl semimetals
Bibliographic record
Abstract
We calculate the ac optical response to circularly polarized light of a Weyl semimetal (WSM) with varying amounts of tilt of the Dirac cones. Both type-I and -II (overtilted) WSMs are considered in a continuum model with broken time-reversal symmetry. The Weyl nodes appear in pairs of equal energies but of opposite momentum and chirality. For type I, the response of a particular node to right-hand polarized (RHP) and left-hand polarized (LHP) light is distinct only in a limited range of photon energy $\mathrm{\ensuremath{\Omega}}, \frac{2}{1+{C}_{2}/v}<\frac{\mathrm{\ensuremath{\Omega}}}{\ensuremath{\mu}}<\frac{2}{1\ensuremath{-}{C}_{2}/v}$ with $\ensuremath{\mu}$ the chemical potential and ${C}_{2}$ the tilt associated with the positive chirality node assuming the two nodes are oppositely tilted. For the overtilted case (type II), the same lower bound applies but there is no upper bound. If the tilt is reversed, the RHP and LHP responses are also reversed. We present corresponding results for the Hall angle.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".