It is a theoretical conjecture that 5/2 fractional quantum Hall state charge e/4 excitations may obey nonAbelian statistics. In edge state interference these purported non-Abelian quasiparticles should display period e/4 Aharonov-Bohm oscillations if the interfering quasiparticle encircles an even number of localized e/4 charges but suppression of oscillations if an odd number is encircled. To ...

We present one-shot GW calculations of the bulk electronic structure of the topological insulators Bi2Se3 and Bi2Te3 within the all-electron full-potential linearized augmented-plane-wave formalism. We compare three different ways of treating the spin-orbit interaction in calculating the quasiparticle energies: (i) The spin-orbit coupling (SOC) is already incorporated in the noninteracting syst...

Physicists have identified dozens of different subatomic species in the particle zoo, but most physical and chemical interactions arise from only three: the proton, the neutron, and the electron. There are a lot of those: solids and liquids contain on the order of 10 particles per cubic centimeter. Each of those quantum mechanical particles may interact with all of the others in the material du...

Thermal transport measurements have been performed on single-crystalline Co-doped BaFe2As2 down to 0.1 K and under magnetic fields up to 7 T. Significant peak anomalies are observed in both thermal conductivity and thermal Hall conductivity below Tc as an indication of the enhancement of the quasiparticle mean-free path. Moreover, we find a sizable residual T -linear term in thermal conductivit...