Competition between magnetism and superconductivity in the organic metal<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>κ</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mo>[</mml:mo><mml:mi>BEDT</mml:mi><mml:mtext>−</mml:mtext><mml:mi>TTF</mml:mi><mml:mo>]</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant="normal">Cu</mml:mi><mml:mrow><mml:mo>[</mml:mo><mml:mi mathvariant="normal">N</mml:mi><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">N</mml:mi><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mo>]</mml:mo></mml:mrow><mml:mi mathvariant="normal">Br</mml:mi></mml:mrow></mml:math>
Bibliographic record
Abstract
Ultrasonic velocity and attenuation measurements on the quasi-two-dimensional organic conductor $\ensuremath{\kappa}\text{\ensuremath{-}}{[\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF}]}_{2}\mathrm{Cu}[\mathrm{N}{(\mathrm{C}\mathrm{N})}_{2}]\mathrm{Br}$ give the first determination of the coexistence zone of the antiferromagnetic and superconducting phases, which extends deep in the metallic part of the pressure-temperature phase diagram of these salts. This zone is identified from a precise control of the thermal cycle, which seems to act as an internal pressure. The two phases are found to compete, whereas superconducting fluctuations begin to contribute to the attenuation at $15\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, namely, at the onset of magnetic order that is well above the superconducting transition temperature ${T}_{c}=11.9\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. Finally, the temperature profile of sound attenuation for both longitudinal and transverse phonon polarizations is found to be inconsistent with a conventional $s$-wave order parameter.
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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 | 0.015 | 0.010 |
| Meta-epidemiology (narrow) | 0.006 | 0.011 |
| Meta-epidemiology (broad) | 0.002 | 0.010 |
| Bibliometrics | 0.004 | 0.009 |
| Science and technology studies | 0.009 | 0.011 |
| Scholarly communication | 0.010 | 0.010 |
| Open science | 0.014 | 0.013 |
| Research integrity | 0.012 | 0.011 |
| Insufficient payload (model declined to judge) | 0.801 | 0.014 |
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".