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Record W1976777214 · doi:10.1103/physrevlett.96.167204

Anomalous Electronic Raman Scattering in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Na</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>CoO</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mo>·</mml:mo><mml:mi>y</mml:mi><mml:msub><mml:mi mathvariant="normal">H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant="normal">O</mml:mi></mml:math>

2006· article· lv· W1976777214 on OpenAlex
P. Lemmens, Kwang‐Yong Choi, V. P. Gnezdilov, E. Ya. Sherman, D. P. Chen, C. T. Lin, F. C. Chou, B. Keimer

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenuePhysical Review Letters · 2006
Typearticle
Languagelv
FieldMaterials Science
TopicAdvanced Thermoelectric Materials and Devices
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsPseudogapRaman spectroscopySuperconductivityRaman scatteringDopingPhysicsMaterials scienceCondensed matter physicsAnalytical Chemistry (journal)CrystallographyChemistryOpticsCuprate

Abstract

fetched live from OpenAlex

Raman scattering experiments on ${\mathrm{Na}}_{x}{\mathrm{CoO}}_{2}\ifmmode\cdot\else\textperiodcentered\fi{}y{\mathrm{H}}_{2}\mathrm{O}$ single crystals show a broad electronic continuum with a pronounced peak around $100\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$ and a cutoff at approximately $560\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$ over a wide range of doping levels. The electronic Raman spectra in superconducting and nonsuperconducting samples are similar at room temperature, but evolve in markedly different ways with decreasing temperature. For superconducting samples, the low-energy spectral weight is depleted upon cooling below ${T}^{*}\ensuremath{\sim}150\text{ }\text{ }\mathrm{K}$, indicating the opening of a pseudogap that is not present in nonsuperconducting materials. Weak additional phonon modes observed below ${T}^{*}$ suggest that the pseudogap is associated with charge ordering.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.007
metaresearch head score (Gemma)0.003
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Science and technology studies, Scholarly communication, Open science, Research integrity, Insufficient payload (model declined to judge)
Consensus categoriesMeta-epidemiology (narrow), Science and technology studies, Research integrity, Insufficient payload (model declined to judge)
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.888
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0070.003
Meta-epidemiology (narrow)0.0040.007
Meta-epidemiology (broad)0.0020.006
Bibliometrics0.0020.005
Science and technology studies0.0050.005
Scholarly communication0.0060.006
Open science0.0090.006
Research integrity0.0050.006
Insufficient payload (model declined to judge)0.4330.009

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.

Opus teacher head0.012
GPT teacher head0.240
Teacher spread0.228 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it