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cond-mat.supr-con2008★ 4 cited
On the contribution of nearly-critical spin and charge collective modes to the Raman spectra of high-Tc cuprates
S. Caprara, C. Di Castro, T. Enss +1
We discuss how Raman spectra are affected by nearly-critical spin and charge collective modes, which are coupled to charge carriers near a stripe quantum critical point. We show th…
cond-mat.supr-con2008★ 3 cited
Low-energy signatures of charge and spin fluctuations in Raman and optical spectra of the cuprates
S. Caprara, C. Di Castro, T. Enss +1
We calculate the optical and Raman response within a phenomenological model of fermion quasiparticles coupled to nearly critical collective modes. We find that, whereas critical sc…
cond-mat.supr-con2006★ 20 cited
Optical conductivity near finite-wavelength quantum criticality
S. Caprara, M. Grilli, C. Di Castro +1
We study the optical conductivity sigma(Omega) of an electron system near a quantum-critical point with finite-wavelength ordering. sigma(Omega) vanishes in clean Galilean-invarian…