Composite Fermions with Tunable Fermi Contour Anisotropy

Abstract

The composite fermion formalism elegantly describes some of the most fascinating behaviours of interacting two-dimensional carriers at low temperatures and in strong perpendicular magnetic fields. In this framework, carriers minimize their energy by attaching two flux quanta and forming new quasi-particles, the so-called composite fermions. Thanks to the flux attachment, when a Landau level is half-filled, the composite fermions feel a vanishing effective magnetic field and possess a Fermi surface with a well-defined Fermi contour. Our measurements in a high-quality two-dimensional hole system confined to a GaAs quantum well demonstrate that a parallel magnetic field can significantly distort the hole-flux composite fermion Fermi contour.

5 pages, 4 figures

References in corpus (4)

• Band mass anisotropy and the intrinsic metric of fractional quantum Hall systems
• Transference of Transport Anisotropy to Composite Fermions
• Fractional quantum Hall states in two-dimensional electron systems with anisotropic interactions
• Ballistic transport of (001) GaAs 2D holes through a strain-induced lateral superlattice

Cited by in corpus (43)

• Wavefunctionology: The Special Structure of Certain Fractional Quantum Hall Wavefunctions
• Thirty Years of Composite Fermions and Beyond
• Chiral Gravitons in Fractional Quantum Hall Liquids
• State Counting for Excited Bands of the Fractional Quantum Hall Effect: Exclusion Rules for Bound Excitons
• Evidence for a $\nu =5/2$ Fractional Quantum Hall Nematic State in Parallel Magnetic Fields
• Fractional quantum Hall effect in a tilted magnetic field
• Geometric quench and nonequilibrium dynamics of fractional quantum Hall states
• Acoustic Wave Absorption as a Probe of Dynamical Geometrical Response of Fractional Quantum Hall Liquids
• Geometry of Compressible and Incompressible Quantum Hall States: Application to Anisotropic Composite Fermion Liquids
• Probing the geometry of the Laughlin state
• Fermi Contour Anisotropy of GaAs Electron-Flux Composite Fermions in Parallel Magnetic Fields
• Anisotropic, two-dimensional, disordered Wigner solid
• Exact results for model wave functions of anisotropic composite fermions in the fractional quantum Hall effect
• Transference of Fermi Contour Anisotropy to Composite Fermions
• A note contrasting two microscopic theories of the fractional quantum Hall effect
• Geometric Resonance of Composite Fermions near Bilayer Quantum Hall States
• Unconventional anisotropic even-denominator fractional quantum Hall state in a system with mass anisotropy
• Numerical study of anisotropy in a composite Fermi liquid
• Composite Fermions with a Warped Fermi Contour
• Anisotropic Pseudopotential Characterization of Quantum Hall Systems under Tilted Magnetic Field
• Anisotropy Driven Transition from Moore-Read State to Quantum Hall Stripes
• Record-quality GaAs two-dimensional hole systems
• Quantum Hall Valley Nematics
• Density functional theory of the fractional quantum Hall effect
• Bilayer mapping of the paired quantum Hall state: Instability toward anisotropic pairing
• Geometric Resonance of Four-Flux Composite Fermions
• Connection between Fermi contours of zero-field electrons and $\nu =\frac{1}{2}$ composite fermions in two-dimensional systems
• Observation of An Anisotropic Wigner Crystal
• Anisotropic composite fermions and fractional quantum Hall effect
• Valley Stoner Instability of the Composite Fermi Sea
• Geometry of flux attachment in anisotropic fractional quantum Hall states
• Phase transition and intrinsic metric of the dipolar fermions in quantum Hall regime
• Interaction-dependent anisotropy of fractional quantum Hall states
• Abelian Chern-Simons Theory for the Fractional Quantum Hall Effect in Graphene
• Determination of the Fermi Contour and Spin-polarization of $\nu =3/2$ Composite Fermions via Ballistic Commensurability Measurements
• Tuning of Fermi Contour Anisotropy in GaAs (001) 2D Holes via Strain
• Composite Fermion Mass
• Ultraclean two-dimensional hole systems with mobilities exceeding 10${}^7$ cm${}^2$/Vs
• The single-mode description of the integer quantum Hall state with dipole-dipole interaction
• Search for Composite Fermions at Filling Factor 5/2: Role of Landau Level and Subband Index
• Collective excitations of quantum Hall states under tilted magnetic field
• $2{\mathbf{k}}_{\mathbf{F}}$ Density Wave Instability of Composite Fermi Liquid
• Emergence of Dirac Composite Fermions: Dipole Picture