Plasmon Dispersions of Superconducting BiPt
Bibliographic record
Abstract
Bi-based binary systems exhibit non-trivial electronic band structure [1] and they represent unique platforms for investigating exotic properties such as topology, Dirac-like band dispersion, surface states, and anisotropic plasmons.In this work we focus on studying the dispersion properties of collective plasmon excitations sustained in pure BiPt crystals, Single crystals of BiPt were grown using the modified Bridgman method.A thin specimen for electron microscopy experiments was created using a focused ion beam microscope.We used diffraction and STEM imaging methodologies to obtain structural information, EDS to access relevant chemical composition information, and momentum-resolved EELS to investigate the dispersive behavior of plasmons.The HAADF STEM images were acquired on a Nion-UltraSTEM microscope operating at 60 kV with an electron probe of 1 resolution.The EDS maps were obtained from Spectra Ultra STEM microscope equipped with an Ultra-X detector for X-ray collection.It was operated at 200 kV with an electron beam current around 100 pA and probe size resolution of 0.5 . Atomically resolved elemental maps were extracted with selected x-ray lines for each element: Bi (M-line of 2.58 keV) and Pt (M-line of 2.12 keV).The momentum-resolved EELS acquisition was conducted using an electron beam with a convergence semi-angle of 2 mrad (2 nm probe size).The scattering signal was selected along specific crystallographic directions using a rectangular slot entrance aperture with the electron beam impinging the crystal along the [0001] direction.
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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) | 0.000 | 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) | 0.002 | 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".