{"id":5514,"date":"2026-09-29T22:25:18","date_gmt":"2026-09-29T22:25:18","guid":{"rendered":"https:\/\/netguide.io\/news\/2026\/09\/29\/ripensare-leffetto-hall-i-ricercatori-rovesciano-unassunzione-in-luogo-dal-1879\/"},"modified":"2026-09-29T22:25:19","modified_gmt":"2026-09-29T22:25:19","slug":"ripensare-leffetto-hall-i-ricercatori-rovesciano-unassunzione-in-luogo-dal-1879","status":"publish","type":"post","link":"https:\/\/netguide.io\/news\/it\/2026\/09\/29\/ripensare-leffetto-hall-i-ricercatori-rovesciano-unassunzione-in-luogo-dal-1879\/","title":{"rendered":"Ripensare l&#8217;effetto Hall: i ricercatori rovesciano un&#8217;assunzione in luogo dal 1879"},"content":{"rendered":"<div id=\"netgu-3741246526\" class=\"netgu-before-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"3494115342\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><p class=\"wp-block-paragraph\"><strong>Un team della Carnegie Mellon University ha rovesciato un presupposto fondamentale della fisica dello stato solido che aveva tenuto dal 1879: il cosiddetto effetto Hall anomalo appare anche quando il campo magnetico si trova nel piano del materiale \u2013 non solo perpendicolare ad esso, come libri di testo insegnati a lungo.<\/strong><\/p>\n\n<h3 class=\"wp-block-heading\">Cosa misurano i ricercatori<\/h3>\n\n<p class=\"wp-block-paragraph\">L&#8217;effetto Hall descrive una tensione trasversale che si presenta quando un campo magnetico deflette vettori di carica in movimento in un conduttore. Nel 1879, Edwin Hall dimostr\u00f2 che era necessario un campo perpendicolare \u2013 un principio usato da allora in sensori e analisi dei materiali. Il gruppo guidato da Simranjeet Singh e Jyoti Katoch costruirono pile atomicamente sottili dal materiale quantistico tantalum iridium telluride (TaIrTe4) e dal composto magnetico chromium germanium telluride (Cr2Ge2Te6). In questi, una risposta anomala Hall potrebbe essere misurata anche con un campo parallelo al piano materiale. I risultati sono apparsi il 3 settembre 2026 nella rivista <em>Materiali naturali<\/em>.<\/p><div id=\"netgu-2403009449\" class=\"netgu-content netgu-entity-placement\"><aside class=\"deals-top deals-top--compact\">\n\n\t\t\t<h3 class=\"deals-top__title\">Top-Deals<\/h3>\n\t\n\t\t\t<ul class=\"deals-top__list\">\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/moon-knight-digital-watch-face-fuer-wear-os-4\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/deal-27-150x150.png\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">MOON KNIGHT Digital Watch Face f\u00fcr Wear OS 4+<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span 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class=\"deals-top__name\">Kostenloses DLC-Bundle f\u00fcr Gears of War E-Day \u2013 Liquid Death Bundle<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t54\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t\t\t<li class=\"deals-top__item\">\n\t\t\t\t\t<a class=\"deals-top__link\" href=\"https:\/\/netguide.io\/deals\/de\/deals\/kostenlose-emote-im-clash-royale-store\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img class=\"deals-top__image\" src=\"https:\/\/netguide.io\/news\/wp-content\/uploads\/sites\/15\/2026\/09\/share-image-clashroyale-150x150.jpg\" alt=\"\" width=\"52\" height=\"52\" loading=\"lazy\" \/>\n\t\t\t\t\t\t\n\t\t\t\t\t\t<span class=\"deals-top__body\">\n\t\t\t\t\t\t\t<span class=\"deals-top__name\">Kostenlose Emote im Clash Royale-Store<\/span>\n\n\t\t\t\t\t\t\t<span class=\"deals-top__meta\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"deals-top__price\">Gratis<\/span>\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\n\t\t\t\t\t\t<span class=\"deals-top__temperature\">\n\t\t\t\t\t\t\t54\u00b0\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t\t<\/ul>\n\n\t\t\t\t\t<p class=\"deals-top__more\">\n\t\t\t\t<a href=\"https:\/\/netguide.io\/deals\/\">Alle Deals ansehen \u2192<\/a>\n\t\t\t<\/p>\n\t\t\t<\/aside>\n<\/div>\n\n<h3 class=\"wp-block-heading\">Perch\u00e9 \u00e8 importante per la tecnologia<\/h3>\n\n<p class=\"wp-block-paragraph\">Un singolo sensore potrebbe in futuro rilevare campi magnetici lungo diverse direzioni spaziali \u2013 invece di combinare pi\u00f9 componenti come oggi. Questo apre prospettive per sensori magnetici pi\u00f9 compatti in elettronica, veicoli e tecnologia medica, cos\u00ec come per spintronica, che utilizza stati magnetici per elaborare informazioni.<\/p>\n\n<h3 class=\"wp-block-heading\">Cosa rimane aperto<\/h3>\n\n<p class=\"wp-block-paragraph\">Questioni di contesto: l&#8217;effetto \u00e8 stato finora osservato solo a basse temperature in laboratorio, su pile di materiale nanometre-thin su misura. Se pu\u00f2 essere riprodotto a temperatura ambiente e in materiali manufacturable rimane poco chiaro. I sensori pronti al mercato sono quindi ancora molto lontani \u2013 il risultato \u00e8 innanzitutto un guadagno fondamentale nella comprensione, non un prodotto finito.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Fonti:<\/strong> <a href=\"https:\/\/www.cmu.edu\/mcs\/news-events\/2026\/0819-hall-effect\" rel=\"noopener\" target=\"_blank\">Carnegie Mellon University (MCS News)<\/a> \u00b7 <a href=\"https:\/\/doi.org\/10.1038\/s41563-026-02611-9\" rel=\"noopener\" target=\"_blank\">Materiali naturali (DOI)<\/a> \u00b7 <a href=\"https:\/\/phys.org\/news\/2026-08-physicists-hall-effect.html\" rel=\"noopener\" target=\"_blank\">phys.org<\/a> \u00b7 <a href=\"https:\/\/www.sciencedaily.com\/releases\/2026\/09\/260901010659.htm\" rel=\"noopener\" target=\"_blank\">ScienzaDai<\/a><\/p><div id=\"netgu-3892757433\" class=\"netgu-after-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"4559785002\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Un team dell&#8217;Universit\u00e0 Carnegie Mellon mostra che l&#8217;effetto Hall anomalo appare anche con un campo magnetico che si trova nel piano del materiale \u2013 non solo perpendicolare ad esso. Il risultato potrebbe consentire sensori magnetici pi\u00f9 semplici, ma rimane la fisica del laboratorio a basse temperature per ora.<\/p>\n","protected":false},"author":1,"featured_media":1833,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[],"tags":[],"class_list":["post-5514","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/5514","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/comments?post=5514"}],"version-history":[{"count":1,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/5514\/revisions"}],"predecessor-version":[{"id":5515,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/5514\/revisions\/5515"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media\/1833"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media?parent=5514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/categories?post=5514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/tags?post=5514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}