2002/01/31 by Sumanta Tewari, Sudip Chakravarty
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.66.054510
published as Phys. Rev. B 66, 054510 (2002). · 6 pages, 1 eps figure. Minor corrections in text were made and a new reference was added
arxiv created 2002/02/05 · openalex publication_date 2002/08/05 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Using a functional integral formulation, we analyze the collective modes in the d-density-wave state. Since only discrete symmetries are broken, no massless phase mode is present. The only relevant fluctuation is the amplitude fluctuation of the order parameter, which is treated at the Gaussian level above the long-range order. These fluctuations give rise to a massive mode, the analog of the U(1) Higgs mode, or amplitude mode at wave vector (\ensuremathπ,\ensuremathπ). Neutrons in inelastic neutron scattering experiments couple to this mode via the orbital currents and are likely to produce direct measurements of this amplitude boson.