2005/08/31 by Takao Morinari, T. Morinari
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.77.075128
published as Phys. Rev. B 77, 075128 (2008) · 14 pages, 2 figures; included details of the derivation of the Maxwell term, corrected some numerical errors, and added references
arxiv created 2005/12/16 · openalex publication_date 2008/02/27 · arxiv updated 2012/03/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Theory of quantum electrodynamics in three spatial-time dimensions is applied to the two-dimensional S=1∕2 quantum Heisenberg antiferromagnet in order to investigate a doped hole in high-temperature superconductors. Strong coupling analysis of the U(1) gauge field interaction is carried out to describe spectral broadening observed in the undoped compounds. It is found that the fermionic quasiparticle spectrum is of Gaussian form with the width about 3J, with J being the superexchange interaction energy. The energy shift of the spectrum is on the order of the quasiparticle bandwidth, which suggests that the system is in the strong coupling regime with respect to the gauge field interaction describing the phase fluctuations about the \ensuremathπ-flux state.