Photoemission Evidence for a Remnant Fermi Surface and a d- Wave-Like Dispersion in Insulating Ca 2 CuO 2 Cl 2
10.1126/science.282.5396.2067
Crossref journal-article
American Association for the Advancement of Science (AAAS)
Science (221)
Abstract

An angle-resolved photoemission study is reported on Ca 2 CuO 2 Cl 2 , a parent compound of high- T c superconductors. Analysis of the electron occupation probability, n( k ), from the spectra shows a steep drop in spectral intensity across a contour that is close to the Fermi surface predicted by the band calculation. This analysis reveals a Fermi surface remnant, even though Ca 2 CuO 2 Cl 2 is a Mott insulator. The lowest energy peak exhibits a dispersion with approximately the |cos k x a – cos k y a | form along this remnant Fermi surface. Together with the data from Dy-doped Bi 2 Sr 2 CaCu 2 O 8+δ , these results suggest that this d -wave–like dispersion of the insulator is the underlying reason for the pseudo gap in the underdoped regime.

Bibliography

Ronning, F., Kim, C., Feng, D. L., Marshall, D. S., Loeser, A. G., Miller, L. L., Eckstein, J. N., Bozovic, I., & Shen, Z.-X. (1998). Photoemission Evidence for a Remnant Fermi Surface and a d- Wave-Like Dispersion in Insulating Ca 2 CuO 2 Cl 2. Science, 282(5396), 2067–2072.

Authors 9
  1. F. Ronning (first)
  2. C. Kim (additional)
  3. D. L. Feng (additional)
  4. D. S. Marshall (additional)
  5. A. G. Loeser (additional)
  6. L. L. Miller (additional)
  7. J. N. Eckstein (additional)
  8. I. Bozovic (additional)
  9. Z.-X. Shen (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 27, 2002, 5:44 a.m.)
Deposited 1 year, 7 months ago (Jan. 13, 2024, 12:28 a.m.)
Indexed 3 weeks ago (Aug. 6, 2025, 9:45 a.m.)
Issued 26 years, 8 months ago (Dec. 11, 1998)
Published 26 years, 8 months ago (Dec. 11, 1998)
Published Print 26 years, 8 months ago (Dec. 11, 1998)
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@article{Ronning_1998, title={Photoemission Evidence for a Remnant Fermi Surface and a d- Wave-Like Dispersion in Insulating Ca 2 CuO 2 Cl 2}, volume={282}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.282.5396.2067}, DOI={10.1126/science.282.5396.2067}, number={5396}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Ronning, F. and Kim, C. and Feng, D. L. and Marshall, D. S. and Loeser, A. G. and Miller, L. L. and Eckstein, J. N. and Bozovic, I. and Shen, Z.-X.}, year={1998}, month=dec, pages={2067–2072} }