Photoemission Evidence for a Remnant Fermi Surface and d-Wave-Like Dispersion in Insulating Ca2CuO2Cl2
In: Science, 282, 2067 (1998); (1999)
Online
report
An angle resolved photoemission study on Ca2CuO2Cl2, a parent compound of high Tc superconductors is reported. 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 Ca2CuO2Cl2 is a Mott insulator. The lowest energy peak exhibits a dispersion with approximately the |cos(kxa)-cos(kya)| form along this remnant Fermi surface. Together with the data from Dy doped Bi2Sr2CaCu2O(8 + delta) these results suggest that this d-wave like dispersion of the insulator is the underlying reason for the pseudo gap in the underdoped regime.
Comment: 9 pages, including 7 figures. Published in Science, one figure corrected
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Photoemission Evidence for a Remnant Fermi Surface and d-Wave-Like Dispersion in Insulating Ca2CuO2Cl2
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Autor/in / Beteiligte Person: | Ronning, F. ; Kim, C. ; Feng, D. L. ; Marshall, D. S. ; Loeser, A. G. ; Miller, L. L. ; Eckstein, J. N. ; Bozovic, I. ; Shen, Z. X. |
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Quelle: | Science, 282, 2067 (1998); (1999) |
Veröffentlichung: | 1999 |
Medientyp: | report |
DOI: | 10.1126/science.282.5396.2067 |
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