{"id":31839,"date":"2025-04-08T07:44:09","date_gmt":"2025-04-08T02:14:09","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=31839"},"modified":"2025-04-16T15:13:45","modified_gmt":"2025-04-16T09:43:45","slug":"topological-materials","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/topological-materials\/","title":{"rendered":"Topological Materials"},"content":{"rendered":"<h2>Topological Materials Latest News<\/h2>\n<p>The United Nations has declared 2025 as the International Year of Quantum Science and Technology, marking 100 years since quantum theory began to revolutionise science.<\/p>\n<h2>What are Topological Materials?<\/h2>\n<ul>\n<li><strong>Topological materials<\/strong> are substances that <strong>exhibit different physical properties on their surface and in their interior<\/strong>.<\/li>\n<li>These materials may behave like a <strong>metal on the outside<\/strong> (conducting electricity) but like an <strong>insulator on the inside<\/strong> (not conducting electricity).<\/li>\n<li>The term <strong>&#8220;topological&#8221;<\/strong> refers to the <strong>unique geometric and quantum properties<\/strong> of the material, which remain unchanged even if the shape of the material is distorted.<\/li>\n<li><strong>Discovered in the latter half of the 20th century<\/strong>, these materials represent a new class of quantum matter.<\/li>\n<li><strong>Nobel Prize in Physics (2016)<\/strong> was awarded to scientists (David Thouless, Duncan Haldane, and Michael Kosterlitz) for their theoretical discoveries in this field.<\/li>\n<\/ul>\n<h2>How Do They Work?<\/h2>\n<ul>\n<li>These materials exhibit a <strong>metallic surface (conducting electrons freely)<\/strong> while maintaining an <strong>insulating core (electrons remain localized)<\/strong>.<\/li>\n<li>This strange duality arises from <strong>quantum mechanical effects<\/strong>, especially the <strong>topology of electronic band structures<\/strong>.<\/li>\n<li>The behaviour is deeply rooted in the principles of <strong>quantum mechanics<\/strong>, where <strong>electron spin and momentum<\/strong> interplay due to a phenomenon called <strong>spin-orbit coupling<\/strong>.<\/li>\n<li>The <strong>interaction of light and matter<\/strong>, the <strong>collective behavior of electrons<\/strong>, and <strong>phase transitions<\/strong> are governed by quantum principles.<\/li>\n<li>The <strong>UN declared 2025 as the International Year of Quantum Science and Technology<\/strong>, marking <strong>100 years since the foundation of quantum mechanics<\/strong>.<\/li>\n<\/ul>\n<h3>Mirror Analogy<\/h3>\n<ul>\n<li>A <strong>mirror<\/strong> appears to be a single object, but it has <strong>two materials<\/strong>:\n<ul>\n<li>A <strong>glass front<\/strong> (an insulator that lets light through)<\/li>\n<li>A <strong>thin metallic back<\/strong> (a conductor that reflects light)<\/li>\n<\/ul>\n<\/li>\n<li>This setup makes it possible to <strong>see your reflection clearly<\/strong>, as the <strong>metal reflects light<\/strong> that passed through the glass.<\/li>\n<\/ul>\n<h2>Why Do Metals and Insulators Differ?<\/h2>\n<ul>\n<li>In <strong>metals<\/strong>, <strong>electrons are free<\/strong> to move \u2014 like <strong>a soup of charge<\/strong>, allowing <strong>conduction of electricity and heat<\/strong>.<\/li>\n<li>In <strong>insulators<\/strong>, electrons are <strong>bound tightly<\/strong> to their atoms and <strong>do not move freely<\/strong>, hence they <strong>do not conduct electricity<\/strong>.<\/li>\n<li>When <strong>light (an electromagnetic wave)<\/strong> hits these materials:\n<ul>\n<li>In <strong>metals<\/strong>, <strong>electrons move collectively<\/strong> and reflect light.<\/li>\n<li>In <strong>insulators<\/strong>, <strong>electrons move individually<\/strong>, allowing light to <strong>pass through<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Topological Materials FAQs<\/h2>\n<p><strong>Q1. <\/strong>What are Topological Materials?<br \/>\n<strong>Ans.<\/strong> These are quantum materials that conduct electricity on their surface or edges while remaining insulators internally.<\/p>\n<p><strong>Q2. <\/strong>Why are Topological Materials significant?<br \/>\n<strong>Ans.<\/strong> They are key to next-gen electronics, quantum computing, and low-power devices due to their unique electronic properties.<\/p>\n<p><strong>Q3. <\/strong>What is an example of a topological material?<br \/>\n<strong>Ans.<\/strong> Topological insulators like bismuth selenide (Bi\u2082Se\u2083) are well-known examples.<\/p>\n<p><strong>Source:<\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/the-magic-of-a-mirror-how-is-it-able-to-show-your-reflection\/article69423216.ece\" target=\"_blank\" rel=\"nofollow noopener\"> TH<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Topological materials are substances that exhibit different physical properties on their surface and in their interior.<\/p>\n","protected":false},"author":5,"featured_media":31840,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-31839","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/31839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=31839"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/31839\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/31840"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=31839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=31839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=31839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}