= Inelastic neutron scattering of TTF-TCNQ
The experiment follows phonon peaks as both momentum and energy transfer are varied. In <inelastic neutron scattering>, $\mathbf q=\mathbf k_i-\mathbf k_f$ locates the lattice modulation and $\hbar\omega=E_i-E_f$ measures the mode energy, so a softened mode can be distinguished from static diffraction alone. Measurements on deuterated <TTF-TCNQ> between $60$ and $300\,\mathrm K$ found a growing <Kohn anomaly> near $2k_F$ below about $150\,\mathrm K$ as the $54\,\mathrm K$ transition was approached.<Phonon dispersion and Kohn anomaly in TTF-TCNQ by Gen Shirane and others>[Abstract: measurement method, temperature interval and wavevector-dependent anomaly]{ref}
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