RF Safe

Spin polarization induced by in-plane electric and magnetic fields in two-dimensional heavy-hole systems.

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

← Research stream
UnclearInsufficient evidencePaper 3307

Using a nonequilibrium Green function approach in a two-dimensional heavy-hole system with cubic Rashba spin-orbit coupling under in-plane electric and magnetic fields, the authors report that longitudinal conductivity decreases monotonically with increasing …

Study snapshot

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

Abstract

Using a nonequilibrium Green function approach, we systematically investigate the current induced spin polarization (CISP) in a two-dimensional heavy-hole system with cubic Rashba spin-orbit coupling, driven by in-plane electric and magnetic fields. We find that when a magnetic field is applied along the direction of electric field, the longitudinal conductivity drops monotonously with an increase of magnetic-field strength or of hole density. The spin polarization along the electric-field direction is just the Pauli paramagnetism and it quadratically increases with an increase of hole density. The nonvanishing out-of-plane component of spin polarization emerges for both short-range and long-range disorders, and it changes sign with the variation of magnetic field, especially for long-range hole-impurity scattering. In the magnetic-field dependences of this out-of-plane CISP and of the in-plane CISP perpendicular to the electric field, there are singular magnetic fields, below or above which the effects of magnetic field are completely different.

Machine Enhanced Logic

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

Using a nonequilibrium Green function approach in a two-dimensional heavy-hole system with cubic Rashba spin-orbit coupling under in-plane electric and magnetic fields, the authors report that longitudinal conductivity decreases monotonically with increasing magnetic-field strength or hole density when the magnetic field is along the electric-field direction. Spin polarization along the electric-field direction is described as Pauli paramagnetism and increases quadratically with hole density. A nonvanishing out-of-plane spin polarization occurs for both short- and long-range disorder and can change sign with magnetic field, with singular magnetic-field values where magnetic-field effects differ below vs above these values.

Outcomes measured

  • current induced spin polarization (CISP)
  • longitudinal conductivity
  • in-plane spin polarization components
  • out-of-plane spin polarization component

Limitations

  • The abstract describes a theoretical/modeling study (nonequilibrium Green function approach) rather than measurements in humans or animals.
  • No exposure metrics relevant to environmental/consumer EMF (e.g., frequency, SAR) are provided in the abstract.
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "current induced spin polarization (CISP)",
    "longitudinal conductivity",
    "in-plane spin polarization components",
    "out-of-plane spin polarization component"
  ],
  "main_findings": "Using a nonequilibrium Green function approach in a two-dimensional heavy-hole system with cubic Rashba spin-orbit coupling under in-plane electric and magnetic fields, the authors report that longitudinal conductivity decreases monotonically with increasing magnetic-field strength or hole density when the magnetic field is along the electric-field direction. Spin polarization along the electric-field direction is described as Pauli paramagnetism and increases quadratically with hole density. A nonvanishing out-of-plane spin polarization occurs for both short- and long-range disorder and can change sign with magnetic field, with singular magnetic-field values where magnetic-field effects differ below vs above these values.",
  "effect_direction": "unclear",
  "limitations": [
    "The abstract describes a theoretical/modeling study (nonequilibrium Green function approach) rather than measurements in humans or animals.",
    "No exposure metrics relevant to environmental/consumer EMF (e.g., frequency, SAR) are provided in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "nonequilibrium Green function",
    "two-dimensional heavy-hole system",
    "cubic Rashba spin-orbit coupling",
    "current induced spin polarization",
    "in-plane electric field",
    "in-plane magnetic field",
    "Pauli paramagnetism",
    "conductivity",
    "disorder",
    "impurity scattering"
  ],
  "suggested_hubs": []
}
AI can be wrong. Always verify against the paper.

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: 10.1088/0953-8984/22/9/095803
PubMed: 21389425

Read the original paper →

Related papers

← Back to the Research Library