High magnetic field induced charge density waves and sign reversal of the Hall coefficient in graphite.

{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "high magnetic field",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "magnetic-field-induced charge density wave transition in graphite",
    "Hall coefficient sign reversal (negative to positive)",
    "angular dependence with respect to c-axis magnetic field component"
  ],
  "main_findings": "In highly oriented pyrolytic graphite at low temperature and very strong magnetic field, a charge density wave transition was observed along with a Hall coefficient sign reversal from negative to positive occurring just after the transition. The transition and Hall sign reversal fields depended on the magnetic field component along the graphite c-axis.",
  "effect_direction": "unclear",
  "limitations": [
    "No sample size or quantitative exposure (field strength) details provided in the abstract.",
    "Temperature range and measurement methods are not described in the abstract.",
    "Not an EMF bioeffects/health study; relevance to EMF exposure contexts is unclear from the abstract alone."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "graphite",
    "high magnetic field",
    "charge density wave",
    "Hall coefficient",
    "sign reversal",
    "angular dependence",
    "quasi-two-dimensional electronic system",
    "highly oriented pyrolytic graphite"
  ],
  "suggested_hubs": []
}