Imaging Quasiparticle Interference in Bi 2 Sr 2 CaCu 2 O 8+δ
Superconductivity (cond-mat.supr-con)
Condensed Matter - Superconductivity
0103 physical sciences
FOS: Physical sciences
01 natural sciences
DOI:
10.1126/science.1072640
Publication Date:
2002-10-01T19:34:46Z
AUTHORS (7)
ABSTRACT
Scanning tunneling spectroscopy of the high-Tc superconductor Bi2Sr2CaCu2O8+delta reveals weak, incommensurate, spatial modulations in conductance. Images these energy-dependent are Fourier analyzed to yield dispersion their wavevectors. Comparison dispersions with photoemission data indicates that quasiparticle interference, due elastic scattering between characteristic regions momentum-space, provides a consistent explanation for conductance modulations, without appeal another order parameter. These results refocus attention on processes as potential explanations other incommensurate phenomena cuprates. The momentum-resolved demonstrated here also new technique which study quasiparticles correlated materials.
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