Signature of Superfluid Density in the Single-Particle Excitation Spectrum of Bi 2 Sr 2 CaCu 2 O 8+δ-Reference-Cited by-同舟云学术

Signature of Superfluid Density in the Single-Particle Excitation Spectrum of Bi 2 Sr 2 CaCu 2 O 8+δ

Published:2000-07-14 Issue:5477 Volume:289 Page:277-281
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Feng D. L.¹,Lu D. H.¹,Shen K. M.¹,Kim C.¹,Eisaki H.¹,Damascelli A.¹,Yoshizaki R.²,Shimoyama J.-i.³,Kishio K.³,Gu G. D.⁴,Oh S.⁵,Andrus A.⁵,O'Donnell J.⁵,Eckstein J. N.⁵,Shen Z.-X.¹

Affiliation:

1. Department of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA.

2. Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan.

3. Department of Applied Chemistry, University of Tokyo, Tokyo 113-8656, Japan.

4. School of Physics, University of New South Wales, Post Office Box 1, Kensington, NSW 2033, Australia.

5. Department of Physics, University of Illinois, Urbana, IL 61801, USA.

Abstract

We report that the doping and temperature dependence of photoemission spectra near the Brillouin zone boundary of Bi 2 Sr 2 CaCu 2 O 8+δ exhibit unexpected sensitivity to the superfluid density. In the superconducting state, the photoemission peak intensity as a function of doping scales with the superfluid density and the condensation energy. As a function of temperature, the peak intensity shows an abrupt behavior near the superconducting phase transition temperature where phase coherence sets in, rather than near the temperature where the gap opens. This anomalous manifestation of collective effects in single-particle spectroscopy raises important questions concerning the mechanism of high-temperature superconductivity.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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