Strong coupling analysis of QED$_3$ for excitation spectrum broadening in undoped high-temperature superconductor

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dc.creatorMorinari, T.
dc.date2007-09-28
dc.date.accessioned2026-07-07T12:08:26Z
dc.date.available2026-07-07T12:08:26Z
dc.descriptionTheory of quantum electrodynamics in three spatial-time dimension 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 band width, which suggests that the system is in the strong coupling regime with respect to the gauge field interaction describing the phase fluctuations about the staggered flux state.
dc.description6 pages
dc.identifierhttps://arxiv.org/abs/0709.4550
dc.identifierhttp://arxiv.org/abs/0709.4550
dc.identifierPhys. Rev. B 77, 075128 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.075128
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209320
dc.subjectStrongly Correlated Electrons
dc.titleStrong coupling analysis of QED$_3$ for excitation spectrum broadening in undoped high-temperature superconductor
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