The influence of temperature and electric field history on the conductivity of the charge density wave system o-TaS3.

Journal of physics. Condensed matter : an Institute of Physics journal · 2010 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3314

Study snapshot

PublicationJournal of physics. Condensed matter : an Institute of Physics journal · 2010

Study typeother

Reported directionUnclear

Evidence ratingInsufficient

Abstract

We have studied the dependence of the low electric field conductivity of the charge density wave (CDW) system o-TaS(3) on the temperature and applied electric field history. Without the application of high electric fields, the conductivity is higher on cooling than on heating in a wide temperature range below the CDW transition. With the application of increasing field at a given temperature the conductivity evolves towards a stable, history-independent value situated between the cooling and heating values. The evolution is gradual but most pronounced around the threshold field for nonlinear conductivity. The relative change of conductivity after the application of high field is asymmetric in respect of the temperature history. We discuss the results within the model of quantized changes of the CDW wavelength induced by the variation of the temperature and the electric field.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

In o-TaS(3), low electric field conductivity was higher on cooling than on heating below the charge density wave transition when high electric fields were not applied. Applying increasing electric field at a fixed temperature caused conductivity to evolve gradually toward a stable, history-independent value between the cooling and heating values, with the strongest evolution around the threshold field for nonlinear conductivity. The relative conductivity change after high-field application was asymmetric with respect to temperature history.

Outcomes measured

low electric field conductivity
nonlinear conductivity threshold behavior
history dependence of conductivity (cooling vs heating)

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
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    "source": null,
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  },
  "population": null,
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  "outcomes": [
    "low electric field conductivity",
    "nonlinear conductivity threshold behavior",
    "history dependence of conductivity (cooling vs heating)"
  ],
  "main_findings": "In o-TaS(3), low electric field conductivity was higher on cooling than on heating below the charge density wave transition when high electric fields were not applied. Applying increasing electric field at a fixed temperature caused conductivity to evolve gradually toward a stable, history-independent value between the cooling and heating values, with the strongest evolution around the threshold field for nonlinear conductivity. The relative conductivity change after high-field application was asymmetric with respect to temperature history.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "o-TaS3",
    "charge density wave",
    "conductivity",
    "temperature history",
    "electric field history",
    "threshold field",
    "nonlinear conductivity"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1088/0953-8984/22/5/055603
PubMed: 21386348

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