Vortex dynamics and phase diagram in the electron-doped cuprate superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Pr</mml:mi><mml:mrow><mml:mn>0.87</mml:mn></mml:mrow></mml:msub><mml:mi>La</mml:mi><mml:msub><mml:mi>Ce</mml:mi><mml:mrow><mml:mn>0.13</mml:mn></mml:mrow></mml:msub><mml:mi>Cu</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>
Bibliographic record
Abstract
Second magnetization peak (SMP) in hole-doped cuprates and iron pnictide superconductors has been widely explored. However, similar feature in the family of electron-doped cuprates is not common. Here, we report the vortex dynamics study in the single crystal of an electron-doped cuprate ${\mathrm{Pr}}_{0.87}{\mathrm{LaCe}}_{0.13}{\mathrm{CuO}}_{4}$ superconductor using dc magnetization measurements. A second magnetization peak feature in the isothermal $M(H)$ was observed for $H\ensuremath{\parallel}ab$ planes. On the other hand, no such feature was observed for the $H\ensuremath{\parallel}c$ axis in the crystal. Using magnetic relaxation data, a detailed analysis of activation pinning energy via collective creep theory suggests an elastic to plastic creep crossover across the SMP. Moreover, for the $H\ensuremath{\parallel}ab$, a peak in the temperature dependence of critical current density is also observed near 7 K, which is likely be related to a dimensional crossover [three-dimensional--two dimensional (3D-2D)] associated with the emergence of Josephson vortices at low temperatures. The anisotropy parameter obtained $\ensuremath{\gamma}\phantom{\rule{4pt}{0ex}}\ensuremath{\approx}8--11$ indicates the 3D nature of vortex lattice mainly for the $H\ensuremath{\parallel}c$ axis. The $H\ensuremath{-}T$ phase diagrams for $H\ensuremath{\parallel}c$ and $H\ensuremath{\parallel}ab$ are presented.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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 source (direct Gemma or distilled Codex), 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".