<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Cs</mml:mi><mml:mprescripts/><mml:none/><mml:mn>133</mml:mn></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>As</mml:mi><mml:mprescripts/><mml:none/><mml:mn>75</mml:mn></mml:mmultiscripts></mml:math>NMR investigation of the normal metallic state of quasi-one-dimensional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Cs</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Cr</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Why this work is in the frame
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Bibliographic record
Abstract
We report $^{133}\mathrm{Cs}$ NMR and $^{75}\mathrm{As}$ nuclear quadrupole resonance (NQR) measurements on the normal metallic state above ${T}_{c}$ of a quasi-one-dimensional superconductor ${\mathrm{Cs}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ (${T}_{c}<1.6$ K). From the $^{133}\mathrm{Cs}$ NMR Knight shift $^{133}K$ measured at the Cs1 site, we show that the uniform spin susceptibility ${\ensuremath{\chi}}_{\mathrm{spin}}$ increases from 295 K to $\ensuremath{\sim}60$ K, followed by a mild suppression; ${\ensuremath{\chi}}_{\mathrm{spin}}$ then levels off below $\ensuremath{\sim}10$ K. In contrast, a vanishingly small magnitude of $^{133}K$ indicates that Cs2 sites contribute very little to electrical conduction and the exchange interactions between 3d electrons at Cr sites. Low frequency Cr spin dynamics, reflected on $^{75}\mathrm{As}\phantom{\rule{4pt}{0ex}}1/{T}_{1}T$ (the nuclear spin-lattice relaxation rate $1/{T}_{1}$ divided by temperature $T$), shows an analogous trend as ${\ensuremath{\chi}}_{\mathrm{spin}}$. Comparison with the results of $1/{T}_{1}T$ near ${T}_{c}$ with ${\mathrm{K}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ (${T}_{c}=6.1$ K) and ${\mathrm{Rb}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ (${T}_{c}=4.8$ K) establishes a systematic trend that substitution of ${\mathrm{K}}^{+}$ ions with larger alkali ions progressively suppresses Cr spin fluctuations together with ${T}_{c}$.
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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 | 0.012 | 0.013 |
| Meta-epidemiology (narrow) | 0.006 | 0.010 |
| Meta-epidemiology (broad) | 0.003 | 0.012 |
| Bibliometrics | 0.003 | 0.007 |
| Science and technology studies | 0.008 | 0.012 |
| Scholarly communication | 0.006 | 0.009 |
| Open science | 0.013 | 0.013 |
| Research integrity | 0.008 | 0.010 |
| Insufficient payload (model declined to judge) | 0.260 | 0.015 |
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