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.

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• Superconducting proximity effect in a transparent van der Waals superconductor-metal junction
• Ferroelectric and anomalous quantum Hall states in bare rhombohedral trilayer graphene
• 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
• Spin-valley Hall transport induced by spontaneous symmetry breaking in half-filled zero Landau level of bilayer graphene
• 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
• Spectroscopic Characterization of Landau Level Splitting and the Intermediate v = 0 Phase in Bilayer Graphene
• 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
• Landau Level Phases in Bilayer Graphene under Pressure at Charge Neutrality