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We observe a critical speeding up in the electronic relaxation time that implies that nematic fluctuations govern the electronic thermalization/cooling dynamics and that magnetic fluctuations dominate the nonlinear signals that arise from the Ising-nematicity.
Ultrafast terahertz intra-excitonic transition ∼6 meV reveals stable quasi-1D many-exciton states that evolve uniquely from a predominant dark exciton population to complex phasespace filling of both dark and bright pair states in (6,5) SWNTs.
Femtosecond-resolved polarimetry characterizes a two-step polarization recovery after non-equilibrium photoexcitation of BaFe2As2. This underpins the nematicity as an independent degree of freedom responsible for the anisotropy, which demonstrates a benchmark approach to anisotropic quantum fluids.
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