{"id":8758,"date":"2020-07-08T12:13:51","date_gmt":"2020-07-08T11:13:51","guid":{"rendered":"https:\/\/senngroup.com\/?p=8758"},"modified":"2020-07-08T13:21:43","modified_gmt":"2020-07-08T12:21:43","slug":"hif_entropy_first_second_order","status":"publish","type":"post","link":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/","title":{"rendered":"From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization"},"content":{"rendered":"<p><a href=\"https:\/\/link.aps.org\/doi\/10.1103\/PhysRevB.102.014101\" target=\"_blank\" rel=\"noopener noreferrer\">Fernando Pomiro, Chris Ablitt, Nicholas C. Bristowe, Arash A. Mostofi, Choongjae Won, Sang-Wook Cheong, and Mark S. Senn.Phys. Rev. B 102, 014101.<\/a><\/p>\n<p>Hybrid improper ferroelectrics (HIFs) have been studied intensively over the past few years to gain an understanding of their temperature-induced phase transitions and ferroelectric switching pathways. Here we report a switching from a first- to a second-order phase transition pathway for HIFs <span id=\"MathJax-Element-1-Frame\" class=\"mjx-chtml MathJax_CHTML\" tabindex=\"0\"><span id=\"MJXc-Node-1\" class=\"mjx-math\"><span id=\"MJXc-Node-2\" class=\"mjx-mrow\"><span id=\"MJXc-Node-3\" class=\"mjx-mrow\"><span id=\"MJXc-Node-4\" class=\"mjx-msub\"><span class=\"mjx-base\"><span id=\"MJXc-Node-5\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-main-R\">Ca<\/span><\/span><\/span><span class=\"mjx-sub\"><span id=\"MJXc-Node-6\" class=\"mjx-mrow\"><span id=\"MJXc-Node-7\" class=\"mjx-mn\"><span class=\"mjx-char MJXc-TeX-main-R\">3<\/span><\/span><span id=\"MJXc-Node-8\" class=\"mjx-mo\"><span class=\"mjx-char MJXc-TeX-main-R\">\u2212<\/span><\/span><span id=\"MJXc-Node-9\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-math-I\">x<\/span><\/span><\/span><\/span><\/span><span id=\"MJXc-Node-10\" class=\"mjx-msub MJXc-space1\"><span class=\"mjx-base\"><span id=\"MJXc-Node-11\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-main-R\">Sr<\/span><\/span><\/span><span class=\"mjx-sub\"><span id=\"MJXc-Node-12\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-math-I\">x<\/span><\/span><\/span><\/span><span id=\"MJXc-Node-13\" class=\"mjx-msub MJXc-space1\"><span class=\"mjx-base\"><span id=\"MJXc-Node-14\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-main-R\">Ti<\/span><\/span><\/span><span class=\"mjx-sub\"><span id=\"MJXc-Node-15\" class=\"mjx-mn\"><span class=\"mjx-char MJXc-TeX-main-R\">2<\/span><\/span><\/span><\/span><span id=\"MJXc-Node-16\" class=\"mjx-msub MJXc-space1\"><span class=\"mjx-base\"><span id=\"MJXc-Node-17\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-main-R\">O<\/span><\/span><\/span><span class=\"mjx-sub\"><span id=\"MJXc-Node-18\" class=\"mjx-mn\"><span class=\"mjx-char MJXc-TeX-main-R\">7<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>, which is driven by the differing entropies of the phases that we identify as being associated with the dynamic motion of octahedral tilts and rotations. A greater understanding of the transition pathways in this class of layered perovskites, which host many physical properties that are coupled to specific symmetries and octahedral rotation and tilt distortions\u2014such as superconductivity, negative thermal expansion, fast ion conductivity, ferroelectricity, among others\u2014is a crucial step in creating novel functional materials by design.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fernando Pomiro, Chris Ablitt, Nicholas C. Bristowe, Arash A. Mostofi, Choongjae Won, Sang-Wook Cheong, and Mark S. Senn.Phys. Rev. B 102, 014101. Hybrid improper ferroelectrics (HIFs) have been studied intensively<br \/><a href=\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\" class=\"more\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":8821,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[67,71,64],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization - SENN GROUP<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization - SENN GROUP\" \/>\n<meta property=\"og:description\" content=\"Fernando Pomiro, Chris Ablitt, Nicholas C. Bristowe, Arash A. Mostofi, Choongjae Won, Sang-Wook Cheong, and Mark S. Senn.Phys. Rev. B 102, 014101. Hybrid improper ferroelectrics (HIFs) have been studied intensivelyRead more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\" \/>\n<meta property=\"og:site_name\" content=\"SENN GROUP\" \/>\n<meta property=\"article:published_time\" content=\"2020-07-08T11:13:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-07-08T12:21:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/senngroup.com\/wp-content\/uploads\/2020\/01\/Fernando_PRB.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1249\" \/>\n\t<meta property=\"og:image:height\" content=\"586\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Mark\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mark\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\"},\"author\":{\"name\":\"Mark\",\"@id\":\"https:\/\/senngroup.com\/#\/schema\/person\/56efbdd98406e419d0c1fb8d15561eda\"},\"headline\":\"From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization\",\"datePublished\":\"2020-07-08T11:13:51+00:00\",\"dateModified\":\"2020-07-08T12:21:43+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\"},\"wordCount\":160,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/senngroup.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/senngroup.com\/wp-content\/uploads\/2020\/01\/Fernando_PRB.png\",\"articleSection\":[\"Ablitt\",\"Pomiro\",\"Publications\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\",\"url\":\"https:\/\/senngroup.com\/hif_entropy_first_second_order\/\",\"name\":\"From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization - 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Bristowe, Arash A. Mostofi, Choongjae Won, Sang-Wook Cheong, and Mark S. Senn.Phys. Rev. B 102, 014101. Hybrid improper ferroelectrics (HIFs) have been studied intensivelyRead more","og_url":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/","og_site_name":"SENN GROUP","article_published_time":"2020-07-08T11:13:51+00:00","article_modified_time":"2020-07-08T12:21:43+00:00","og_image":[{"width":1249,"height":586,"url":"https:\/\/senngroup.com\/wp-content\/uploads\/2020\/01\/Fernando_PRB.png","type":"image\/png"}],"author":"Mark","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Mark","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/#article","isPartOf":{"@id":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/"},"author":{"name":"Mark","@id":"https:\/\/senngroup.com\/#\/schema\/person\/56efbdd98406e419d0c1fb8d15561eda"},"headline":"From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization","datePublished":"2020-07-08T11:13:51+00:00","dateModified":"2020-07-08T12:21:43+00:00","mainEntityOfPage":{"@id":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/"},"wordCount":160,"commentCount":0,"publisher":{"@id":"https:\/\/senngroup.com\/#organization"},"image":{"@id":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/#primaryimage"},"thumbnailUrl":"https:\/\/senngroup.com\/wp-content\/uploads\/2020\/01\/Fernando_PRB.png","articleSection":["Ablitt","Pomiro","Publications"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/","url":"https:\/\/senngroup.com\/hif_entropy_first_second_order\/","name":"From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization - 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