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The modulation of the de Haas-van Alphen effect in graphene by electric field.

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

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In graphene with an in-plane uniform electric field, the de Haas-van Alphen magnetization and magnetic susceptibility are modulated via the parameter β = E/(vF B). As β increases, magnetization and susceptibility diverge to positive or negative infinity at βc…

Study snapshot

PublicationJournal of physics. Condensed matter : an Institute of Physics journal · 2010
Study typeother
Reported directionUnclear
Evidence ratingInsufficient

Abstract

This paper explores the de Haas-van Alphen effect (dHvA) of graphene in the presence of an in-plane uniform electric field. Three major findings are yielded. First of all, the electric field is found to modulate the de Haas-van Alphen magnetization and magnetic susceptibility through the dimensionless parameter (β = E/(v(F)B). As the parameter β increases, the values of magnetization and magnetic susceptibility increase to positive infinity or decrease to negative infinity at the exotic point β(c) = 1. Furthermore, the dHvA oscillation amplitude rises abruptly to infinity for zero temperature at β(c) = 1, but eventually collapses at a finite temperature, thereby leading to the de Haas-van Alphen effect vanishing. In addition, the magnetic susceptibility depends on the electric and magnetic fields, suggesting that graphene should be a non-linear magnetic medium in the presence of an external field. These results, which are different from those obtained in the standard non-relativistic 2D electron gas, are attributed to the anomalous Landau level spectrum of graphene.

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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 graphene with an in-plane uniform electric field, the de Haas-van Alphen magnetization and magnetic susceptibility are modulated via the parameter β = E/(vF B). As β increases, magnetization and susceptibility diverge to positive or negative infinity at βc = 1; the dHvA oscillation amplitude diverges at zero temperature at βc = 1 but collapses at finite temperature, leading to the dHvA effect vanishing. Magnetic susceptibility depends on both electric and magnetic fields, suggesting nonlinear magnetic behavior under external fields.

Outcomes measured

  • de Haas-van Alphen (dHvA) magnetization
  • magnetic susceptibility
  • dHvA oscillation amplitude
  • vanishing of dHvA effect at finite temperature (at βc=1)
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
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  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "de Haas-van Alphen (dHvA) magnetization",
    "magnetic susceptibility",
    "dHvA oscillation amplitude",
    "vanishing of dHvA effect at finite temperature (at βc=1)"
  ],
  "main_findings": "In graphene with an in-plane uniform electric field, the de Haas-van Alphen magnetization and magnetic susceptibility are modulated via the parameter β = E/(vF B). As β increases, magnetization and susceptibility diverge to positive or negative infinity at βc = 1; the dHvA oscillation amplitude diverges at zero temperature at βc = 1 but collapses at finite temperature, leading to the dHvA effect vanishing. Magnetic susceptibility depends on both electric and magnetic fields, suggesting nonlinear magnetic behavior under external fields.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "graphene",
    "de Haas-van Alphen effect",
    "electric field",
    "magnetization",
    "magnetic susceptibility",
    "Landau levels",
    "nonlinear magnetic medium"
  ],
  "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: 10.1088/0953-8984/22/11/115302
PubMed: 21389460

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