| Autor: |
Gottschalch, V., Benndorf, G., Selle, S., Krüger, E., Blaurock, S., Kneiß, M., Bar, M., Sturm, C., Merker, S., Höche, T., Grundmann, M., Krautscheid, H. |
| Přispěvatelé: |
Publica |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Popis: |
Isolated small crystals and closed epitaxial layers of CuI could be deposited on various substrates by close distance sublimation (CDS). X-ray diffraction measurements and detailed TEM studies revealed phase pure cubic g-CuI (zincblende structure) layers and a combination of a CuI multilayer structure with g-CuI. The multilayer structure, a 12R polytype with the space group R3m, the lattice parameters a0 = 0.4279 nm, c0 = 4.25 nm, and a twelve layers array consisting of wurtzite-like and zincblende layer sequences in combination with g-CuI could be detected. The presence of the polytype phase was detected always together with g-CuI. The epitaxial relationships between the CuI phases and various substrates are discussed. Low temperature (2 K) photoluminescence spectra of phase-pure g-CuI layers show typical excitonic emission spectra in the range between 3.0 and 3.1 eV. Samples containing both, the 12R polytype and g-CuI, additionally reveal a predominant series of intense emission lines around 3.25 eV attributed to excitonic emission from the rhombohedral phase. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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