Electrical transport in InAs/GaSb superlattice: role of surface states and interface roughness
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Bibliographic record
Abstract
We have modeled electrical properties of InAs/GaSb superlattice (SL) using band structure calculations based on an atomistic empirical pseudopotential method and mobility estimates. The model quantitatively explains the experimental results obtained on a SL sample using the technique of 'quantitative mobility spectrum analysis (QMSA)'. We show that the factors that influence in-plane electrical transport in this system are different under low- and high-temperature regimes. This difference primarily arises from the location of conducting regions. At lower temperatures the electron density, emanating from the defects in a cap GaSb layer, is essentially confined to a few wells near the surface of the SL. At higher temperatures, conduction is dominated by thermally excited carriers which are more uniformly spread over the entire SL. We identify dominant scattering mechanisms that limit the electron mobility under both regimes and show that interface roughness plays a significant role in the high-temperature regime.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 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 it