Temperature-Induced Momentum-Dependent Spectral Weight Transfer in Bi 2 Sr 2 CaCu 2 O 8+δ-Reference-Cited by-同舟云学术

Temperature-Induced Momentum-Dependent Spectral Weight Transfer in Bi 2 Sr 2 CaCu 2 O 8+δ

Published:1998-04-10 Issue:5361 Volume:280 Page:259-262
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Shen Z.-X.¹²³⁴,White P. J.¹²³⁴,Feng D. L.¹²³⁴,Kim C.¹²³⁴,Gu G. D.¹²³⁴,Ikeda H.¹²³⁴,Yoshizaki R.¹²³⁴,Koshizuka N.¹²³⁴

Affiliation:

1. Z.-X. Shen, P. J. White, D. L. Feng, C. Kim, Department of Applied Physics, Department of Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA.

2. G. D. Gu, School of Physics, The University of New South Wales, Post Office Box 1, Kensington, New South Wales 2033, Australia.

3. H. Ikeda and R. Yoshizaki, Institute of Applied Physics and Cryogenics Center, University of Tsukuba, Tsukuba, Ibaraki 305, Japan.

4. N. Koshizuka, Superconductivity Research Laboratory, ISTEC, 10–13 Shinonome, 1-chome, Koto-ku, Tokyo 135, Japan.

Abstract

Angle-resolved photoemission data from the cuprate superconductor Bi 2 Sr 2 CaCu 2 O 8+δ above and below the superconducting transition temperature T c reveal momentum-dependent changes that extend up to an energy of about 0.3 electron volt, or 40 kT c (where k is the Boltzmann constant). The data suggest an anomalous transfer of spectral weight from one momentum to another, involving a sizable momentum transfer Q ∼ (0.45π, 0). The observed Q is intriguingly near the charge-order periodicity required if fluctuating charge stripes are present.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference30 articles.

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4. Spectra were recorded with a chamber attached to beamline 5-3 of the Stanford Synchrotron Radiation Laboratory. The total energy resolution was typically 35 meV, and the angular resolution was ±1°. The nominal chamber pressure during the measurement was 3 × 10−11 to 5 × 10−11 torr, and the photon energy used was 22.4 eV. At this photon energy, the data approximate the momentum-resolved single-particle spectral weight function A(k, ω). Our high-quality single crystals were grown by the traveling–floating-zone method. Some of these crystals were used as reference samples for systematic doping studies using Fe, Zn, and Ni [G. D. Gu, et al., J. Cryst. Growth 130, 325 (1993); ibid. 137, 472 (1994); D.-S. Jeon, et al., Physica C 253, 102 (1995)]. The data presented here were obtained from a sample withT c = 88 K, near optimal in the Bi2Sr2CaCu2O8+δsystem. The results were reproduced in three samples from the same growth batch by Gu and colleagues. The spectra from these samples show a systematic set of subtle but important differences from other samples that we have used before [Mitzi D. B., et al., Phys. Rev. B 41, 6564 (1990)]. The details of these differences, their relation to the effects reported here, and the implications will be published elsewhere.

5. Key features in the measured band structure ofBi2Sr2CaCu2O8+δ: Flat bands atEFand Fermi surface nesting

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