Perfect spin and valley polarized quantum transport in twisted SiC nanoribbons
Bibliographic record
Abstract
Abstract The edge magnetism of zigzag SiC nanoribbons in its ground state is half-metallic, but is competed by a non-half-metal state that is energetically extremely close. In this work, we propose and theoretically analyze two-probe transport junctions that overcome this difficulty so that perfect half-metal quantum transport is realized. When two zigzag SiC nanoribbons are connected by a C–Si–C–Si tetramer where the right ribbon is turned by 180° around the transport direction, 100% spin polarization with nearly perfect transmission is obtained due to perfect momentum k -matching across the transport junction. We show such a transport to be independent of the magnetic configurations of the two ribbons. A concomitant property is that 100% valley polarized charge transport is achieved. In principle, the structure of the proposed transport junction turns SiC nanoribbons into a promising, robust, and essentially perfect spin and valley filter.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 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".