Surface passivation is of great technological importance due to the increasing miniaturisation of
\nelectronic devices. It has been known for many years that under certain conditions surface states
\ncan form; when they do so in a quantum well (QW) the result is an unbound (i.e., evanescent) state
\nin the QW. Such surface states are generally undesirable, so a good physical understanding of them
\nis important. A simple single- p -orbital valence band model is used with two types of surface
\npassivation to examine surface states in a QW: (1) an energy upshift added to the terminal atoms;
\nand (2) explicit passivation by an s -orbital on each end of the QW. These models show these
\nunbound\/evanescent QW states can occur in both models; that in them the wavefunction is bound to the
\nterminal atoms; and that the existence of these states is connected to the effective valence-band
\noffset between the terminal atoms and the bulk QW.<\/p>\n","protected":false},"excerpt":{"rendered":"
Surface passivation is of great technological importance due to the increasing miniaturisation of
\nelectronic devices. It has been known for many years that under certain conditions surface states
\ncan form; when they do so in a quantum well (QW) the r…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-361112","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/361112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=361112"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/361112\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=361112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=361112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=361112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}