Composite Fermions with a Warped Fermi Contour

Abstract

Via measurements of commensurability features near Landau filling factor $\nu =1/2$, we probe the shape of the Fermi contour for hole-flux composite fermions confined to a wide GaAs quantum well. The data reveal that the composite fermions are strongly influenced by the characteristics of the Landau level in which they are formed. In particular, their Fermi contour is $\text{warped}$ when their Landau level originates from a hole band with significant warping.

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Cited by in corpus (18)

• Geometric quench and nonequilibrium dynamics of fractional quantum Hall states
• Particle-hole symmetry and composite fermions in fractional quantum Hall states
• Exact results for model wave functions of anisotropic composite fermions in the fractional quantum Hall effect
• Transference of Fermi Contour Anisotropy to Composite Fermions
• Numerical study of anisotropy in a composite Fermi liquid
• 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
• Composite fermions in bands with N-fold rotational symmetry
• Berry phase of the composite-fermion Fermi Sea: Effect of Landau-level mixing
• Connection between Fermi contours of zero-field electrons and $\nu =\frac{1}{2}$ composite fermions in two-dimensional systems
• 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
• Interaction-dependent anisotropy of fractional quantum Hall states
• Ultraclean two-dimensional hole systems with mobilities exceeding 10${}^7$ cm${}^2$/Vs
• $2{\mathbf{k}}_{\mathbf{F}}$ Density Wave Instability of Composite Fermi Liquid