Publications by authors named "Liam A Cohen"
Article Synopsis
- Bernal bilayer graphene exhibits even-denominator fractional quantum Hall states, theorized to have a Pfaffian wave function with non-Abelian quasiparticle excitations.
- The study reports measurements of fractional quantum Hall energy gaps, revealing a transport activation gap of 5.1 K at 12 T for a half-filled N=1 Landau level, which aligns with theoretical predictions.
- However, the measured thermodynamic gap of 11.6 K is about half of what was expected in an ideal clean scenario, a discrepancy attributed to disorder effects analyzed through a model of a Wigner crystal of fractional quasiparticles.
One-dimensional conductors are described by Luttinger liquid theory, which predicts a power-law suppression of the single-electron tunneling density of states at low voltages. The scaling exponent is predicted to be quantized when tunneling into a single isolated chiral edge state of the fractional quantum Hall effect. We report conductance measurements across a point contact linking integer and fractional quantum Hall edge states (at fillings 1 and [Formula: see text], respectively).
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