2017/09/30 by Bo Yang, Ching Hua Lee, Chi Zhang +1
Materials Science · Physics and Astronomy · #Anisotropy #Composite fermion #Condensed matter physics #Fractional quantum Hall effect #Graphene research and applications #Isotropy #Landau quantization #Magnetic field #Physics #Pseudopotential #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.96.195140
published as Phys. Rev. B 96, 195140 (2017) · 14 pages, 10 figures, comments very welcome
arxiv created 2017/11/20 · openalex publication_date 2017/11/20 · arxiv updated 2017/11/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We analytically derived the effective two-body interaction for a finite thickness quantum Hall system with a harmonic perpendicular confinement and an in-plane magnetic field. The anisotropic effective interaction in the lowest Landau level (LLL) and first Landau level (1LL) are expanded in the basis of the generalized pseudopotentials (PPs), and we analyze how the coefficients of some prominent isotropic and anisotropic PPs depend on the thickness of the sample and the strength of the in-plane magnetic field. We also investigate the stability of the topological quantum Hall states, especially the Laughlin state and its emergent guiding center metric, which we can now compute analytically. An interesting reorientation of the anisotropy direction of the Laughlin state in the 1LL is revealed, and we also discuss various possible experimental ramifications for this quantum Hall system with broken rotational symmetry.