Metallic Phase and Temperature Dependence of the $\nu =0$ Quantum Hall State in Bilayer Graphene

Abstract

The $\nu =0$ quantum Hall state of bilayer graphene is a fertile playground to realize many-body ground states with various broken symmetries. Here we report the experimental observations of a previously unreported metallic phase. The metallic phase resides in the phase space between the previously identified layer polarized state at large transverse electric field and the canted antiferromagnetic state at small transverse electric field. We also report temperature dependence studies of the quantum spin Hall state of $\nu =0$. Complex nonmonotonic behavior reveals concomitant bulk and edge conductions and excitations. These results provide a timely experimental update to understand the rich physics of the $\nu =0$ state.

References in corpus (10)

• Nonlocal edge state transport in the quantum spin Hall state
• Quantum Anomalous Hall State in Bilayer Graphene
• Evidence for a Spin Phase Transition at ν=0 in Bilayer Graphene
• Low density ferromagnetism in biased bilayer graphene
• Minimum Conductivity and Evidence for Phase Transitions in Ultra-clean Bilayer Graphene
• Competing Nematic, Anti-ferromagnetic and Spin-flux orders in the Ground State of Bilayer Graphene
• Transport Gap in Suspended Bilayer Graphene at Zero Magnetic Field
• Spin-Valley Coherent Phases of the $\nu =0$ Quantum Hall State in Bilayer Graphene
• Spontaneous Layer Polarization and Conducting Domain Walls in the Quantum Hall Regime of Bilayer Graphene
• Critical point for the CAF-F phase transition at charge neutrality in bilayer graphene

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• Gapless Spin Wave Transport through a Quantum Canted-Antiferromagnet
• Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene
• Phase diagram of the $\nu =2$ quantum Hall state in bilayer graphene
• Dual-gated hBN/bilayer-graphene superlattices and the transitions between the insulating phases at the charge neutrality point
• Helical Edge States and Quantum Phase Transitions in Tetralayer Graphene
• Landau Levels of Bilayer Graphene in a WSe${}_2$/Bilayer Graphene van der Waals Heterostructure
• Chiral detection of Majorana bound states at the edge of a quantum spin Hall insulator
• Hetero-Orbital Two-Component Fractional Quantum Hall States in Bilayer Graphene
• Spontaneous charge-ordered state in Bernal-stacked bilayer graphene
• Temperature-induced phase transitions in the quantum Hall magnet of bilayer graphene
• Infrared spectroscopy of phase transitions in the lowest Landau levels of bilayer graphene