{"id":4716,"date":"2023-12-14T16:33:29","date_gmt":"2023-12-14T07:33:29","guid":{"rendered":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/?p=4716"},"modified":"2023-12-27T16:43:53","modified_gmt":"2023-12-27T07:43:53","slug":"extraordinary-magnetic-response-of-an-anisotropic-2d-antiferromagnet-via-site-dilution","status":"publish","type":"post","link":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/news\/4716\/","title":{"rendered":"Extraordinary Magnetic Response of an Anisotropic 2D Antiferromagnet via Site Dilution"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><a href=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/press20231214_en.jpg\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/press20231214_en.jpg\" alt=\"\" class=\"wp-image-4717\" width=\"500\" height=\"279\" srcset=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/press20231214_en.jpg 1000w, https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2023\/12\/press20231214_en-300x167.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/figure><\/div>\n\n\n<p>A prominent characteristic of 2D magnetic systems is the enhanced spin fluctuations, which reduce the ordering temperature. We report that a magnetic field of only 1000th of the Heisenberg superexchange interaction can induce a crossover, which for practical purposes is the effective ordering transition, at temperatures about 6 times the N\u00e9el transition in a site-diluted two-dimensional anisotropic quantum antiferromagnet. Such a strong magnetic response is enabled because the system directly enters the antiferromagnetically ordered state from the isotropic disordered state, skipping the intermediate anisotropic stage. The underlying mechanism is achieved on a pseudospin-half square lattice realized in the [(SrIrO<sub>3<\/sub>)<sub>1<\/sub>\/(SrTiO<sub>3<\/sub>)<sub>2<\/sub>] superlattice thin film that is designed to linearly couple the staggered magnetization to external magnetic fields by virtue of the rotational symmetry-preserving Dzyaloshinskii\u2013Moriya interaction. Our model analysis shows that the skipping of the anisotropic regime despite finite anisotropy is due to the enhanced isotropic fluctuations under moderate dilution.<\/p>\n\n\n\n<p>See below for more information.<\/p>\n\n\n\n<ul>\n<li>Aritcle URL :\u00a0<a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/acs.nanolett.3c02470\">https:\/\/pubs.acs.org\/doi\/10.1021\/acs.nanolett.3c02470<\/a><\/li>\n\n\n\n<li>Todo Lab. :\u00a0<a href=\"https:\/\/exa.phys.s.u-tokyo.ac.jp\/ja\"><a href=\"https:\/\/exa.phys.s.u-tokyo.ac.jp\/ja\">https:\/\/exa.phys.s.u-tokyo.ac.jp\/ja<\/a><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"A prominent characteristic of 2D magnetic systems is the enhanced spin fluctuations, which reduce the ordering [&hellip;]","protected":false},"author":7,"featured_media":4717,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[39,10],"_links":{"self":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/4716"}],"collection":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=4716"}],"version-history":[{"count":1,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/4716\/revisions"}],"predecessor-version":[{"id":4718,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/4716\/revisions\/4718"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media\/4717"}],"wp:attachment":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=4716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=4716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=4716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}