4 ms·
The study in question, which is much more modest in terms of claims, and much more interesting: http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys4240
by QAPereo 9y ago
The study in question, which is much more modest in terms of claims, and much more interesting: http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys4240.html?foxtrotcallback=true http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys...
Key point:
Notably, the measured conductance exceeds the maximum conductance possible for free electrons. This anomalous behaviour is attributed to collective movement of interacting electrons, which ‘shields’ individual carriers from momentum loss at sample boundaries
- nine_k 9y agoWow, could we call graphene a semisuperconductor now?
- azag0 9y agoRather than meaning “superb conductivity”, superconductivity is a specific electronic state of matter in which the conductivity drops to zero at a certain critical temperature, and magnetic fields are “expelled” from the material. In conventional (low-temperature) superconductors, this is caused by formation of electron pairs (Cooper pairs) that behave as bosons. There is no established mechanism for unconventional (high-temperature) superconductivity. In any case, the present study does not mean that graphene is a superconductor.
- StavrosK 9y agoConductivity drops to zero? Did you mean resistance?
- nine_k 9y agoGraphene does not appear to be a superconductor, but apparently the enhanced conductivity is due to electrons forming interesting structures which lower the scattering effects of the atomic lattice. It reminded me about Cooper pairs, hence the joke.