Imaging Quasiparticle Interference in Bi 2 Sr 2 CaCu 2 O 8+δ | Zendy

Jennifer E. Hoffman | Zendy; K. McElroy | Zendy; D.-H. Lee | Zendy; Kyle M. Lang | Zendy; Hiroshi Eisaki | Zendy; S. Uchida | Zendy; J. C. Davis | Zendy

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Imaging Quasiparticle Interference in Bi ₂ Sr ₂ CaCu ₂ O _8+δ

Author(s) -

Jennifer E. Hoffman,

K. McElroy,

D.-H. Lee,

Kyle M. Lang,

Hiroshi Eisaki,

S. Uchida,

J. C. Davis

Publication year - 2002

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1072640

Subject(s) - quasiparticle , condensed matter physics , quantum tunnelling , spectroscopy , physics , scattering , cuprate , conductance , dispersion (optics) , photoemission spectroscopy , superconductivity , optics , quantum mechanics , spectral line

Scanning tunneling spectroscopy of the high-Tc superconductor Bi2Sr2CaCu2O8+delta 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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