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Imaging Quasiparticle Interference in Bi2Sr2CaCu2O8+d

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arxiv cond-mat/0209276 v1 pith:Z3FFC6WR submitted 2002-09-12 cond-mat.supr-con

J. E. Hoffman , K. McElroy , D.-H. Lee , K. M Lang , H. Eisaki , S. Uchida , J.C. Davis This is my paper
classification cond-mat.supr-con
keywords modulationsquasiparticlespectroscopytunnelingbi2sr2cacu2o8conductanceincommensurateinterference
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Scanning tunneling spectroscopy of the high-Tc superconductor Bi2Sr2CaCu2O8+d reveals weak, incommensurate, spatial modulations in the tunneling conductance. Images of these energy-dependent modulations are Fourier analyzed to yield the dispersion of their wavevectors. Comparison of the dispersions with photoemission spectroscopy data indicates that quasiparticle interference, due to elastic scattering between characteristic regions of momentum-space, provides a consistent explanation for the conductance modulations, without appeal to another order parameter. These results refocus attention on quasiparticle scattering processes as potential explanations for other incommensurate phenomena in the cuprates. The momentum-resolved tunneling spectroscopy demonstrated here also provides a new technique with which to study quasiparticles in correlated materials.

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  1. Thermal SU(2) lattice gauge theory for intertwined orders and hole pockets in the cuprates

    cond-mat.str-el 2025-07 unverdicted novelty 6.0 of 10

    Monte Carlo study of thermal SU(2) gauge theory with Higgs boson reconciles Fermi arcs and p/8 hole pockets while describing intertwined orders and d-wave superconductivity at lower temperatures.

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