<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math> Knight shift in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>UTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>: Evidence for relocalization in a Kondo lattice
Bibliographic record
Abstract
The local magnetic susceptibility of the spin-triplet superconductor ${\mathrm{UTe}}_{2}$ has been investigated by positive muon (${\ensuremath{\mu}}^{+}$) Knight shift measurements in the normal state. Three distinct ${\ensuremath{\mu}}^{+}$ Knight shift components are observed for a magnetic field applied parallel to the $c$ axis. Two of these exhibit a breakdown in the linear relationship with the bulk magnetic susceptibility ($\ensuremath{\chi}$) below a temperature ${T}^{*}\ensuremath{\sim}30\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, which points to a gradual emergence of a correlated Kondo liquid. Below ${T}_{\mathrm{r}}\ensuremath{\sim}12\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ linearity is gradually restored, indicating relocalization of the Kondo liquid quasiparticles. The third Knight shift component is two orders of magnitude larger, and despite the $c$-axis alignment of the external field, scales with the $a$ axis $\ensuremath{\chi}$ above ${T}_{\mathrm{r}}\ensuremath{\sim}12\phantom{\rule{0.28em}{0ex}}\mathrm{K}$. We conjecture that this component is associated with magnetic clusters and the change in the temperature dependence of all three Knight shift components below ${T}_{\mathrm{r}}$ is associated with a change in magnetic correlations. Our findings indicate that prior to the onset of superconductivity the development of the itinerant heavy-electron fluid is halted by a gradual development of local U $5f$-moment fluctuations.
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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 | 0.004 | 0.004 |
| Meta-epidemiology (narrow) | 0.002 | 0.003 |
| Meta-epidemiology (broad) | 0.002 | 0.005 |
| Bibliometrics | 0.001 | 0.004 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.004 | 0.003 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.003 | 0.011 |
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".