NMR Investigation of the Quasi-One-Dimensional Superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">K</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi>Cr</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi>As</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:math>
Why this work is in the frame
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Bibliographic record
Abstract
We report $^{75}\mathrm{As}$ NMR measurements on the new quasi-one-dimensional superconductor ${\mathrm{K}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ (${T}_{c}\ensuremath{\sim}6.1\text{ }\text{ }\mathrm{K}$) [J. K. Bao et al., Phys. Rev. X 5, 011013 (2015)]. We found evidence for strong enhancement of Cr spin fluctuations above ${T}_{c}$ in the $[{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}{]}_{\ensuremath{\infty}}$ double-walled subnanotubes based on the nuclear spin-lattice relaxation rate $1/{T}_{1}$. The power-law temperature dependence, $1/{T}_{1}T\ensuremath{\sim}{T}^{\ensuremath{-}\ensuremath{\gamma}}$ ($\ensuremath{\gamma}\ensuremath{\sim}0.25$), is consistent with the Tomonaga-Luttinger liquid. Moreover, absence of the Hebel-Slichter coherence peak of $1/{T}_{1}$ just below ${T}_{c}$ suggests an unconventional nature of superconductivity.
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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 | 0.008 | 0.008 |
| Meta-epidemiology (narrow) | 0.003 | 0.005 |
| Meta-epidemiology (broad) | 0.001 | 0.006 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.004 | 0.008 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.008 | 0.007 |
| Research integrity | 0.004 | 0.005 |
| Insufficient payload (model declined to judge) | 0.862 | 0.009 |
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