{"id":3958,"date":"2022-12-05T11:36:02","date_gmt":"2022-12-05T02:36:02","guid":{"rendered":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/?p=3958"},"modified":"2022-12-22T14:34:40","modified_gmt":"2022-12-22T05:34:40","slug":"spin-orbital-liquid-state-and-liquid-gas-metamagnetic-transition-on-a-pyrochlore-lattice","status":"publish","type":"post","link":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/news\/3958\/","title":{"rendered":"Spin\u2013orbital liquid state and liquid\u2013gas metamagnetic transition on a pyrochlore lattice"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"alignright size-full is-resized\"><a href=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2022\/12\/2b530e80c7d0de90885e285c5d798063.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2022\/12\/2b530e80c7d0de90885e285c5d798063.png\" alt=\"\" class=\"wp-image-3959\" width=\"456\" height=\"130\" srcset=\"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2022\/12\/2b530e80c7d0de90885e285c5d798063.png 911w, https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2022\/12\/2b530e80c7d0de90885e285c5d798063-300x85.png 300w\" sizes=\"(max-width: 456px) 100vw, 456px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>Crystal structures with degenerate electronic orbitals are unstable towards lattice distortions that lift the degeneracy. Although these Jahn\u2013Teller distortions have profound effects on magnetism, they are typically unaffected by the onset of magnetic ordering because of a separation in energy scales. Here we show the contrary case in Pr<sub>2<\/sub>Zr<sub>2<\/sub>O<sub>7<\/sub>, where orbital degeneracy remains down to the millikelvin range due to an interplay between spins and orbitals. Pr<sub>2<\/sub>Zr<sub>2<\/sub>O<sub>7<\/sub>&nbsp;is a multipolar spin ice with strongly localized 4<em>f<\/em>&nbsp;electrons in an even-number configuration, giving rise to a non-Kramers doublet that carries transverse quadrupolar and longitudinal dipolar moments. Our study of ultrapure single crystals of Pr<sub>2<\/sub>Zr<sub>2<\/sub>O<sub>7<\/sub>&nbsp;finds comprehensive evidence for enhanced spin\u2013orbital quantum dynamics of the non-Kramers doublet. This dynamical Jahn\u2013Teller effect is encapsulated by the liquid\u2013gas metamagnetic transition that is characteristic of spin ice being accompanied by strong lattice softening. This behaviour suggests that a spin\u2013orbital liquid state forms on the pyrochlore lattice at low temperatures and low magnetic fields.<\/p>\n\n\n\n<p>See below for more information.<\/p>\n\n\n\n<ul><li>Aritcle URL :&nbsp;<a href=\"https:\/\/www.nature.com\/articles\/s41567-022-01816-4\">https:\/\/www.nature.com\/articles\/s41567-022-01816-4<\/a><\/li><li>Nakatsuji Lab.: <a href=\"https:\/\/www.nakatsuji-lab.phys.s.u-tokyo.ac.jp\/?lang=en\">https:\/\/www.nakatsuji-lab.phys.s.u-tokyo.ac.jp\/?lang=en<\/a><\/li><\/ul>\n\n\n","protected":false},"excerpt":{"rendered":"Crystal structures with degenerate electronic orbitals are unstable towards lattice distortions that lift the  [&hellip;]","protected":false},"author":7,"featured_media":3959,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/3958"}],"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=3958"}],"version-history":[{"count":2,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/3958\/revisions"}],"predecessor-version":[{"id":3987,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/3958\/revisions\/3987"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media\/3959"}],"wp:attachment":[{"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=3958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=3958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=3958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}