Pressure‐Induced Metallization and Isostructural Transitions in 3R‐MoS<sub>2</sub>
Bibliographic record
Abstract
Abstract At ambient conditions 3R‐polytypes of transition metal dichalcogenides (TMDs) demonstrate fascinating properties because of their unique layer stacking. Understanding the structure‐property relationship is essential for the realization of their use in spintronic, valleytronic, and optoelectronic applications. Herein, after the high pressure‐temperature synthesis of 3R‐MoS 2 in a large volume cubic press, a concomitant experimental and theoretical high‐pressure study of 3R‐MoS 2 is reported, leading to the discovery of pressure‐induced reversible isostructural phase transitions without symmetry breaking. Concurrent with the isostructural transitions, a semiconductor‐to‐metal transition is observed, owing to strong interlayer interaction and charge redistribution across the van der Waals gap under pressure. The pressure‐induced enhancement of interlayer interactions together with the robust intrinsic layer stacking in 3R‐MoS 2 prevent the layers from sliding under pressure and hinder a corresponding volume collapse. This study on continuous pressure‐tuning of crystal and electronic structure in 3R‐MoS 2 will play a vital role in developing the next‐generation devices involving coupling of structural, optical, and electrical properties of 3R‐polytypes of TMDs and other layered materials.
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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 | 0.000 | 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".