5 papers · 1 filter
Skyrmion Excitations in the Quantum Hall state in Monolayer Graphene
Jincheng An, Ajit C. Balram, Ganpathy Murthy
We investigate the skyrmion excited states atop the quantum Hall ferromagnetic ground state at filling factor in monolayer graphene. The competition among short-ran…
Anomalous Transport Gaps of Fractional Quantum Hall Phases in Graphene Landau Levels are Induced by Spin-Valley Entangled Ground States
Jincheng An, Ajit C. Balram, Udit Khanna +1
We evaluate the transport gaps in the most prominent fractional quantum Hall states in the and Landau Levels of graphene, accounting for the Coulo…
Uniquely identifying quantum Hall phases in charge neutral graphene
Jincheng An, Ganpathy Murthy
Charge-neutral graphene in the quantum Hall regime is an example of a quantum Hall ferromagnet in a complex spin-valley space. This system exhibits a plethora of phases, with the p…
Fractional quantum Hall coexistence phases in higher Landau levels of graphene
Jincheng An, Ajit C. Balram, Udit Khanna +1
Monolayer graphene under a strong magnetic field near charge neutrality manifests the integer and fractional quantum Hall effects. Since only some of the four spin/valley flavors a…
Magnon transmission across mono-layer graphene junction as a probe of electronic structure
Suman Jyoti De, Sumathi Rao, Ganpathy Murthy
We study magnon transmission across gate-controlled junctions in the manifold of Landau levels in monolayer graphene, in the presence of both spin and valley Zeeman fields. S…