Citation: Banerjee, Mitali, et al. "Observation of half-integer thermal Hall conductance." Nature 559.7713 (2018): 205-210.
Web: https://arxiv.org/abs/1710.00492
Tags: Hardware, Physical, Quantum-hall-effect, Majorana-fermions
This paper is the first one to experimentally observe the thermal Hall conductance of the nu=5/2 filling fraction of the fractional quantum Hall system. They found the Hall conductance in AlGaAs to be 5/2, in appropriate dimensionless units. The most common prediction, however, was 3/2. So this was a surprising result, which prompted many people to try to explain the observation:
> Simon, Steven H. "Interpretation of thermal conductance of the v= 5/2 edge." Physical Review B 97.12 (2018): 121406.
> Mross, David F., et al. "Theory of disorder-induced half-integer thermal hall conductance." Physical Review Letters 121.2 (2018): 026801.
> Simon, Steven H., and Bernd Rosenow. "Partial equilibration of the anti-Pfaffian edge due to Majorana disorder." Physical Review Letters 124.12 (2020): 126801.
The evidence is not yet conclusive. Hence, the verdict is still out on exactly what is going on with the v=5/2 level of the fractional quantum hall system.