{"id":2659,"date":"2012-01-09T13:39:00","date_gmt":"2012-01-09T12:39:00","guid":{"rendered":"https:\/\/forschungsnetzwerk-chim.de\/?post_type=publikationen&#038;p=2659"},"modified":"2024-01-26T12:03:03","modified_gmt":"2024-01-26T11:03:03","slug":"dielectric-function-and-bowing-parameters-of-ingan-alloys","status":"publish","type":"publikationen","link":"https:\/\/forschungsnetzwerk-chim.de\/en\/publications\/dielectric-function-and-bowing-parameters-of-ingan-alloys\/","title":{"rendered":"Dielectric function and bowing parameters of InGaN alloys"},"content":{"rendered":"\n<p>Ga-rich (0001)-oriented In<sub><em>x<\/em><\/sub>Ga<sub>1\u2212<em>x<\/em><\/sub>N alloys grown by molecular beam epitaxy or metal-organic vapour phase epitaxy on GaN\/sapphire templates were investigated by spectroscopic ellipsometry at room temperature. The analysis of the extracted dielectric function yielded the characteristic transition energies, i.e., for the band gaps and the high-energy critical points (van Hove singularities). Accounting for strain by using the\u00a0<strong><em>k<\/em><\/strong>\u2009\u00b7\u2009<strong><em>p<\/em><\/strong>\u00a0formalism, a band-gap bowing parameter of 1.65\u2009\u00b1\u20090.07\u2009eV for strain-free material was deduced. It is consistent with the\u00a0<em>ab initio<\/em>\u00a0calculated band-gap-dependence for uniform (not clustered) InGaN alloys. The bowing parameters for the high-energy inter-band transitions were found to be close to \u223c1\u2009eV.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Publication:<\/b> 2012<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"beteiligte":[],"class_list":["post-2659","publikationen","type-publikationen","status-publish","hentry","publikationen_category-physical-chemistry"],"acf":[],"_links":{"self":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/publikationen\/2659","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=2659"}],"wp:term":[{"taxonomy":"beteiligte","embeddable":true,"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/beteiligte?post=2659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}