Electron-spin polarization in symmetric type-II quantum wells from bulk inversion asymmetry
Bibliographic record
Abstract
The effect of the bulk inversion asymmetry on electron-spin polarization by resonant tunneling in symmetric, nonmagnetic, type-II semiconductor quantum wells is investigated within the envelope function approximation. A $14\ifmmode\times\else\texttimes\fi{}14\mathbf{k}\ensuremath{\cdot}\mathbf{p}$ matrix Hamiltonian is used which includes the nonparabolicity and spin-split nature of the energy-band structure. Spin-dependent boundary conditions are derived and the transfer-matrix method is applied to obtain analytical expressions for the electron-spin polarization in single- and double-quantum wells. Numerical calculations of the polarization are performed for quantum well systems made from InAs and GaSb. It is shown that the inversion asymmetry of the bulk materials can produce electron-spin polarizations of up to $90%$ for oblique tunneling.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.003 | 0.002 |
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; both teacher heads agree on what is shown here.
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".