Surface study of the 83-K superconductor Bi2Sr2CaCu2O8 by low-energy electron diffraction and angle-resolved inverse photoemission spectroscopy
R. Claessen, R. Manzke, H. Carstensen, B. Burandt, T. Buslaps, M. Skibowski, J. Fink
DOI 10.1103/PhysRevB.39.7316 · Physical Review B
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Abstract
Low-energy-electron-diffraction (LEED) and angle-resolved inverse photoemission spectroscopy (ARIPES) have been applied to the cleaved surface of Bi2Sr2CaCu2O8 single crystals. The LEED pattern shows a surface lattice which is identical to the superlattice found in the bulk structure. ARIPES along the ΓX(a*) direction yields nondispersive unoccupied electronic states at 2.9 and ∼5 eV above the Fermi energy attributed to Bi-O derived conduction bands. At 0.47 ΓX the experimental density of states at the Fermi level increases. This may be due to the crossing of the O(1) band through EF derived from oxygen atoms in the Cu-O planes.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 83 | Pressure not reported | unknown |
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