Imaging Quasiparticle Interference in Bi 2 Sr 2 CaCu 2 O 8+δ-Reference-Cited by-同舟云学术

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

Published:2002-08-16 Issue:5584 Volume:297 Page:1148-1151
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Hoffman J. E.¹,McElroy K.¹,Lee D.-H.¹²,Lang K. M¹³,Eisaki H.⁴⁵⁶,Uchida S.⁶,Davis J. C.¹²

Affiliation:

1. Department of Physics, University of California, Berkeley, CA 94720–7300, USA.

2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

3. Electromagnetic Technology Division, National Institute of Standards and Technology, Boulder, CO 80305–3328, USA.

4. Department of Applied Physics, Stanford University, Stanford, CA 94305–4090, USA.

5. Agency of Industrial Science and Technology, 1-1-1 Central 2, Umezono, Tsukuba, Ibaraki, 305-8568 Japan.

6. Department of Superconductivity, University of Tokyo, Tokyo, 113-8656 Japan.

Abstract

Scanning tunneling spectroscopy of the high- T c superconductor Bi 2 Sr 2 CaCu 2 O 8+δ 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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