Feedback effect on high-energy magnetic fluctuations in the model high-temperature superconductor HgBa 2CuO 4+δ observed by electronic Raman scattering - Yuan Li; M. Le Tacon; M. Bakr; D. Terrade; D. Manske; R. Hackl; L. Ji; M.K. Chan; N. Bariić; X. Zhao; M. Greven; B. Keimer (Physical Review Letters, 2012)