Composite fermion

E400608

Emergent particle Quasiparticle

A composite fermion is a quasiparticle formed by an electron bound to an even number of magnetic flux quanta, playing a key role in explaining the fractional quantum Hall effect.

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All labels observed (2)

Label	Occurrences
Composite fermion canonical	1
Composite fermion theory	1

Statements (46)

Predicate	Object
instanceOf	Emergent particle ⓘ Quasiparticle ⓘ
associatedWith	Chern–Simons theory ⓘ surface form: Chern–Simons gauge field Flux attachment transformation ⓘ
composedOf	Electron ⓘ Even number of magnetic flux quanta ⓘ
effectiveDescriptionOf	Strongly correlated electrons in high magnetic fields ⓘ
emergesAt	Landau level filling factor ν = 1/2 ⓘ Other even-denominator effective fields ⓘ
emergesIn	quantum Hall effect ⓘ surface form: Fractional quantum Hall regime
explains	Odd-denominator filling fractions ⓘ Sequence of fractional quantum Hall plateaus ⓘ
formedIn	Strong perpendicular magnetic field ⓘ Two-dimensional electron gas ⓘ
hasEffectiveFillingFactor	p (integer) ⓘ
hasElectricCharge	Electron charge ⓘ
hasFillingFactorMapping	ν = p/(2p±1) ⓘ
hasProperty	Can form Fermi sea at half-filled Landau level ⓘ Can form compressible metallic-like states ⓘ Can form incompressible quantum liquids ⓘ Charge transport carrier in fractional quantum Hall states ⓘ Effective mass different from bare electron mass ⓘ Electron bound to even number of flux quanta ⓘ Emergent from electron–electron interactions ⓘ Emergent gauge field coupling ⓘ Forms Landau-like levels (Λ levels) ⓘ Maps fractional quantum Hall states to integer quantum Hall states of composite fermions ⓘ Quasiparticle lifetime determined by interactions and disorder ⓘ Quasiparticle of topological origin ⓘ
hasSpin	Half-integer spin ⓘ
hasTheoreticalTool	Flux-smearing approximation ⓘ Chern–Simons theory ⓘ surface form: Mean-field Chern–Simons theory
introducedBy	Jainendra K. Jain ⓘ
introducedInYear	1989 ⓘ
movesIn	Reduced effective magnetic field ⓘ
obeysStatistics	Fermi–Dirac statistics ⓘ
observedIn	GaAs/AlGaAs quantum wells ⓘ High-mobility semiconductor heterostructures ⓘ
playsRoleIn	quantum Hall effect ⓘ surface form: Fractional quantum Hall effect
relatedConcept	Anyons ⓘ Landau levels ⓘ surface form: Landau level Laughlin quasiparticle ⓘ Quantum Hall ferromagnetism ⓘ
relatedTheory	Composite fermion self-linksurface differs ⓘ surface form: Composite fermion theory
studiedIn	Condensed matter physics ⓘ quantum Hall effect ⓘ surface form: Quantum Hall systems

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Fermion → isClassifiedAs → Composite fermion ⓘ

Composite fermion → relatedTheory → Composite fermion self-linksurface differs ⓘ

this entity surface form: Composite fermion theory