{"id":22954,"date":"2011-11-30T20:59:31","date_gmt":"2011-11-30T17:59:31","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=22954"},"modified":"2011-11-30T20:59:31","modified_gmt":"2011-11-30T17:59:31","slug":"grafeenlehtedes-avastati-uus-elektriline-olek","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=22954","title":{"rendered":"Grafeenlehtedes avastati uus elektriline olek"},"content":{"rendered":"<p><strong>Londoni Nanotehnoloogiate Keskuse (LCN) teadlased avastasid grafiidilise \u00fclijuhi grafeenlehtede pinnal elektroonilised triibud, mida nimetatakse ,,laengutiheduse laineteks.&#8221; See on esimene kord, kui neid triipe grafeeni pinnal t\u00e4heldatud on, ning sel on grafeeni kasutamisele t\u00f5en\u00e4oliselt suur m\u00f5ju.<\/strong><\/p>\n<div id=\"attachment_22955\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/11\/grapheneearn.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-22955\" class=\"size-medium wp-image-22955\" title=\"grapheneearn\" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2011\/11\/grapheneearn-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/11\/grapheneearn-300x225.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/11\/grapheneearn-250x187.jpg 250w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2011\/11\/grapheneearn.jpg 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-22955\" class=\"wp-caption-text\">Need on grafiidilise \u00fclijuhi pinnal olevad elektrilised triibud, mida kutsutakse ,,laengutiheduse laineteks.&quot; Pilt: K. A. Rahnejat<\/p><\/div>\n<p>LCN-i teadlased lisasid grafeeni pinnale lisaelektrone, libistades kaltsiumi aatomeid selle alt l\u00e4bi. Tavaliselt v\u00f5iks eeldada, et need lisaelektronid jagunevad grafeeni pinnal \u00fchtlaselt just nii, nagu \u00f5li jaotub veepinnale. Skaneeriva tunnelmikroskoobi abil leidsid teadlased aga, et lisaelektronid korrastavad ennast spontaanselt nanomeetri skaalas olevatesse triipudesse. See ootamatu k\u00e4itumine demonstreerib seda, et elektronidel on omaette elu, mis pole otseselt allolevate aatomitega seotud, kirjutab <a href=\"http:\/\/www.physorg.com\/news\/2011-11-graphene-stripes-nanoscale-electronic-state.html\">Physorg.com<\/a>.<\/p>\n<p>See uus tulemus inspireerib mitmeid uusi suundasid nii teaduses kui ka tehnoloogias. N\u00e4iteks pakuti v\u00e4lja uus meetod infromatsiooni k\u00e4sitlemiseks ja kodeerimiseks, milles binaarsed nullid ja \u00fched vastavad vastavalt p\u00f5hjast l\u00f5unasse ja idast l\u00e4\u00e4nde jooksvatele triipudele.<\/p>\n<p>See uurimus on osa j\u00e4tkuvast mitmedistsiplinaarsest grafeeni uurimisest LCN-is ning on j\u00e4rjeks grafiit-\u00fclijuhi CaC6\u00a0\u00fclijuhtivuse algsele avastamisele Welleri ja teiste poolt artiklis, mis avaldati teadusajakirjas <em>Nature Physics, <\/em>doi:10.1038\/nphys0010.<\/p>\n<p>Leideni \u00dclikooli prominentne teadlane <strong>Jan Zaanen<\/strong> kommenteeris tulemust j\u00e4rgnevalt: ,,See avastus on j\u00e4rjekordne oluline samm triipude k\u00f5ikjalviibimise kohta, ning fakt, et need on olemas ka maailma lihtsaimas p\u00f5hiaines &#8211; s\u00fcsiniku aatomite kahedimensionaalses v\u00f5restikus ehk grafeenis &#8211; t\u00e4hendab seda, et veelgi rohkem head teadust ja rakendusi ei ole enam kaugel.&#8221;<\/p>\n<p><a href=\"http:\/\/www.physorg.com\/news\/2011-11-graphene-stripes-nanoscale-electronic-state.html\">Allikas<\/a><\/p>\n<p>Teadusartikkel: &#8220;<a href=\"http:\/\/www.nature.com\/ncomms\/journal\/v2\/n11\/full\/ncomms1574.html\">Charge density waves in the graphene sheets of the superconductor CaC6<\/a>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Londoni Nanotehnoloogiate Keskuse (LCN) teadlased avastasid grafiidilise \u00fclijuhi grafeenlehtede pinnal elektroonilised triibud, mida nimetatakse ,,laengutiheduse laineteks.&#8221; See on esimene kord, kui neid triipe grafeeni pinnal t\u00e4heldatud on, ning sel on grafeeni kasutamisele t\u00f5en\u00e4oliselt suur m\u00f5ju. LCN-i teadlased lisasid grafeeni pinnale lisaelektrone, libistades kaltsiumi aatomeid selle alt l\u00e4bi. Tavaliselt v\u00f5iks eeldada, et need lisaelektronid jagunevad grafeeni [&hellip;]<\/p>\n","protected":false},"author":32,"featured_media":22955,"comment_status":"open","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":[31,16],"tags":[45,110],"class_list":{"0":"post-22954","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-rakenduslik-teadus","8":"category-teadusuudis","9":"tag-grafeengrafaan","10":"tag-materjal","11":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/22954","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\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22954"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/22954\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/media\/22955"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}