| Autor: |
Jörg Fink, R. Manzke, H. Carstensen, B. Burandt, Ralph Claessen, T. Buslaps, Michael Skibowski |
| Rok vydání: |
1989 |
| Předmět: |
|
| Zdroj: |
Physical Review B. 39:7316-7319 |
| ISSN: |
0163-1829 |
| DOI: |
10.1103/physrevb.39.7316 |
| Popis: |
Low-energy-electron-diffraction (LEED) and angle-resolved inverse photoemission spectroscopy (ARIPES) have been applied to the cleaved surface of ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{CaCu}}_{2}$${\mathrm{O}}_{8}$ single crystals. The LEED pattern shows a surface lattice which is identical to the superlattice found in the bulk structure. ARIPES along the \ensuremath{\Gamma}X(${a}^{\mathrm{*}}$) direction yields nondispersive unoccupied electronic states at 2.9 and \ensuremath{\sim}5 eV above the Fermi energy attributed to Bi-O derived conduction bands. At 0.47 \ensuremath{\Gamma}X the experimental density of states at the Fermi level increases. This may be due to the crossing of the O(1) band through ${E}_{F}$ derived from oxygen atoms in the Cu-O planes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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