Strong electronic interaction and multiple quantum Hall ferromagnetic phases in trilayer graphene

Abstract

There is an increasing interest in the electronic properties of few layer graphene as it offers a platform to study electronic interactions because the dispersion of bands can be tuned with number and stacking of layers in combination with electric field. However, electronic interaction becomes important only in very clean devices and so far the trilayer graphene experiments are understood within non-interacting electron picture. Here, we report evidence of strong electronic interactions and quantum Hall ferromagnetism (QHF) seen in ABA trilayer graphene (ABA-TLG). Due to high mobility $\sim$500,000 cm${}^2$V${}^{-1}$s${}^{-1}$ in our device compared to previous studies, we find all symmetry broken states and that Landau Level (LL) gaps are enhanced by interactions; an aspect explained by our self-consistent Hartree-Fock (H-F) calculations. Moreover, we observe hysteresis as a function of filling factor ($\nu$) and spikes in the longitudinal resistance which, together, signal the formation of QHF states at low magnetic field.

6 pages, 5 figures

References in corpus (9)

• Quantum Hall Ferromagnetism in Graphene
• Landau Level Splitting in Graphene in High Magnetic Fields
• Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
• Quantum Hall effect and Landau level crossing of Dirac fermions in trilayer graphene
• Single particle relaxation time versus transport scattering time in a 2D graphene layer
• New Dirac points and multiple Landau level crossings in biased trilayer graphene
• Landau level splittings, phase transitions, and non-uniform charge distribution in trilayer graphene
• Gate-induced Dirac cones in multilayer graphenes
• Tunable symmetries of integer and fractional quantum Hall phases in heterostructures with multiple Dirac bands

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• Landau level diagram and the continuous rotational symmetry breaking in trilayer graphene
• Spontaneous Gully Polarized Quantum Hall States in ABA Trilayer Graphene
• Non-trivial quantum oscillation geometric phase shift in a trivial band
• Gully quantum Hall ferromagnetism in biased trilayer graphene
• High-resolution Tunneling Spectroscopy of ABA-stacked Trilayer Graphene
• Phase diagram of the $\nu =2$ quantum Hall state in bilayer graphene
• Multiple crossing of Landau levels of two-dimensional fermions in double HgTe quantum wells
• Twist Angle-Dependent Bands and Valley Inversion in 2D Materials/hBN Heterostructures
• Magnetotransport study of the mini-Dirac cone in AB-stacked four- to six-layer graphene under perpendicular electric field
• Probing the Anisotropic Fermi Surface in Tetralayer Graphene via Transverse Magnetic Focusing
• The interplay of ferroelectricity and magneto-transport in non-magnetic moiré superlattices
• Quantum Parity Hall effect in ABA Graphene
• Correlated interlayer quantum Hall state in large-angle twisted trilayer graphene
• Skyrmionic Transport and First Order Phase Transitions in Twisted Bilayer Graphene Quantum Hall Ferromagnet