Electron tunneling spectroscopy of a quantum antidot in the quantum Hall regime

Abstract

Quantum antidot, a small potential hill introduced into a two-dimensional electron system, presents an attractive tool to study quantum mechanics of interacting electrons.Here, we report experiments on electron resonant tunneling via a quantum antidot on the integer i = 1, 2, 3, 4, 5, and 6 quantum Hall plateaus. Several new features are reported. First, as a function of magnetic field, we observe up to six quasiperiodic resonant tunneling peaks within the fundamental flux period: when flux h/e is added to the area of the antidot there are i peaks on the i-th integer plateau, when i spin-polarized Landau levels are occupied. Corresponding back gate voltage data show one peak per added charge e on all integer plateaus. Second, we observe tunneling dips in four-terminal resistance ("forward scattering") on the even i = 2, 4, and 6 plateaus, when population of both spins is nearly equal. Also, for the first time, we report an internal structure within the h/e period: on the i = 3 spin-split plateau, two of the three resonant tunneling peaks are higher and/or closer than the third. Puzzlingly, in this regime, when back gate voltage is swept, the tunneling peaks are grouped in pairs. These results are attributed to the dominance of the electron-electron Coulomb interaction, effectively mixing Landau level occupation, and to the self-consistent electrostatics of the antidot.

References in corpus (7)

• Detection of Coulomb Charging around an Antidot in the Quantum Hall Regime
• Energetics of Quantum Antidot States in Quantum Hall Regime
• Invariance of Charge of Laughlin Quasiparticles
• Quantum computation with quasiparticles of the Fractional Quantum Hall Effect
• The quenching of compressible edge states around antidots
• Hole maximum density droplets of an antidot in strong magnetic fields
• Fractional charge revealed in computer simulations of resonant tunneling in the fractional quantum Hall regime

Cited by in corpus (23)

• Coulomb Oscillations in Antidots in the Integer and Fractional Quantum Hall Regimes
• Electron interferometry in quantum Hall regime: Aharonov-Bohm effect of interacting electrons
• Upstream modes and antidots poison graphene quantum Hall effect
• Interacting electrons in the Aharonov-Bohm interferometer
• Electron-electron interactions in antidot-based Aharonov-Bohm interferometers
• Imaging backscattering through impurity-induced antidots in quantum Hall constrictions
• Magnetic field control of the intraband optical absorption in two-dimensional quantum rings
• Viscous Dissipation in One-Dimensional Quantum Liquids
• Dirac Fermion Quantum Hall Antidot in Graphene
• Signatures of non-Abelian statistics in non-linear coulomb blockaded transport
• Spectator Behavior in a Quantum Hall Antidot with Multiple Bound Modes
• Temperature-dependent screening of the edge state around antidots in the quantum Hall regime
• Capacitive interaction model for Aharonov-Bohm effects of a quantum Hall antidot
• Wave function description of conductance mapping for quantum Hall electron interferometer
• Transport through a quantum spin Hall antidot as a spectroscopic probe of spin textures
• Orbital Kondo effect in fractional quantum Hall systems
• Spin-Resolved Edge States around an Antidot in the Vicinity of the $\nu =2$ Quantum Hall State
• Revisiting Coulomb diamond signatures in quantum Hall interferometers
• Coulomb oscillations of a quantum antidot formed by an airbridged pillar gate in the integer and fractional quantum Hall regime
• Triple Antidot Molecules
• Observation of Coulomb blockade in nanostructured epitaxial bilayer graphene on SiC
• Designing atomic-scale resistive circuits in topological insulators through vacancy-induced localized modes
• Quantum statistics and self-interference in extended colliders