PIRSA:12110089

Amplitude mode of the d-density wave state and its relevance to high-Tc cuprates

Mandal, I. (2012). Amplitude mode of the d-density wave state and its relevance to high-Tc cuprates. Perimeter Institute. https://pirsa.org/12110089

Mandal, Ipsita. Amplitude mode of the d-density wave state and its relevance to high-Tc cuprates. Perimeter Institute, Nov. 30, 2012, https://pirsa.org/12110089 

          @misc{ pirsa_PIRSA:12110089,
            doi = {10.48660/12110089},
            url = {https://pirsa.org/12110089},
            author = {Mandal, Ipsita},
            keywords = {Condensed Matter},
            language = {en},
            title = {Amplitude mode of the d-density wave state and its relevance to high-Tc cuprates},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {nov},
            note = {PIRSA:12110089 see, \url{https://pirsa.org}}
          }

Ipsita Mandal Polish Academy of Sciences (PAS) - Institute of Nuclear Physics

DOI 10.48660/12110089
Collection
Talk Type Scientific Series
Subject

Abstract

We study the spectrum of the amplitude mode, the analog of the Higgs mode in high energy physics, for the d-density wave (DDW) state proposed to describe the anomalous phenomenology of the pseudogap phase of the high Tc cuprates. Even though the state breaks translational symmetry by a lattice spacing and is described by a particle-hole singlet order parameter at the wave vector q = Q = (pi, pi), remarkably, we find that the amplitude mode spectrum can have peaks at both q = (0, 0) and q = Q = (pi , pi). In general, the spectra is non-universal, and, depending on the microscopic parameters, can have one or two peaks in the Brillouin zone, signifying confluence of two kinds of magnetic excitations. In light of the recent unexpected observations of multiple magnetic excitations in the pseudogap phase our theory sheds important light on how multiple inelastic neutron peaks at different wave vectors can arise even with an order parameter that condenses at Q = (pi, pi). [Reference: arXiv:1207.6834]