{"id":2612,"date":"2010-06-24T14:45:00","date_gmt":"2010-06-24T12:45:00","guid":{"rendered":"https:\/\/forschungsnetzwerk-chim.de\/?post_type=publikationen&#038;p=2612"},"modified":"2024-01-24T17:48:04","modified_gmt":"2024-01-24T16:48:04","slug":"2612","status":"publish","type":"publikationen","link":"https:\/\/forschungsnetzwerk-chim.de\/en\/publications\/2612\/","title":{"rendered":"Valence-band splitting and optical anisotropy of AlN"},"content":{"rendered":"\n<p>The dielectric function (DF) of hexagonal AlN on Si(111) is determined in the range between 1 and 9.8 eV by spectroscopic ellipsometry (SE). Due to its significant negative crystal field splitting, wurtzite AlN exhibits a pronounced dichroism. To demonstrate that SE is sensitive to both components of the DF around the absorption edge, a uniaxial model is applied, providing transition energies for the free excitonic state. In-plane tensile stress leads to a redshift of these transitions and an increased splitting. The experimental data is compared with the results of band structure calculations, showing excellent overall agreement. Additionally, two high-energy critical points in the ordinary DF at energies of approximately 7.75 and 8.85 eV were determined.<\/p>\n\n<p>Rossbach, G., R\u00f6ppischer, M., Schley, P., Gobsch, G., Werner, C., Cobet, C., Esser, N., Dadgar, A., Wieneke, M., Krost, A., &amp; Goldhahn, R. (2010). Valence-band splitting and optical anisotropy of ALN. <em>Physica Status Solidi (b)<\/em>, <em>247<\/em>(7), 1679\u20131682. https:\/\/doi.org\/10.1002\/pssb.200983677<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Publication:<\/b> 2010<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"beteiligte":[],"class_list":["post-2612","publikationen","type-publikationen","status-publish","hentry","publikationen_category-inorganic-chemistry","publikationen_category-physical-chemistry"],"acf":[],"_links":{"self":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/publikationen\/2612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/publikationen"}],"about":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/types\/publikationen"}],"wp:attachment":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/media?parent=2612"}],"wp:term":[{"taxonomy":"beteiligte","embeddable":true,"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/beteiligte?post=2612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}