{"id":9567,"date":"2024-01-04T10:34:18","date_gmt":"2024-01-04T01:34:18","guid":{"rendered":"https:\/\/physics.gist.ac.kr\/?post_type=research_news&#038;p=9567"},"modified":"2024-01-04T11:02:11","modified_gmt":"2024-01-04T02:02:11","slug":"%eb%85%bc%eb%ac%b8%ec%84%b1%ea%b3%bc-fa-ca-%ec%8b%a0%eb%8f%99%eb%b9%88-%ea%b5%90%ec%88%98-%ec%96%91%ec%9e%90-%ec%83%81%ec%9c%a0%ec%a0%84%ec%b2%b4%ec%9d%b8-%ec%8a%a4%ed%8a%b8%eb%a1%a0%ed%8a%ac","status":"publish","type":"research_news","link":"https:\/\/physics.gist.ac.kr\/en\/news-events\/research_highlights_news\/%eb%85%bc%eb%ac%b8%ec%84%b1%ea%b3%bc-fa-ca-%ec%8b%a0%eb%8f%99%eb%b9%88-%ea%b5%90%ec%88%98-%ec%96%91%ec%9e%90-%ec%83%81%ec%9c%a0%ec%a0%84%ec%b2%b4%ec%9d%b8-%ec%8a%a4%ed%8a%b8%eb%a1%a0%ed%8a%ac\/","title":{"rendered":"[\ub17c\ubb38\uc131\uacfc-FA &#038; CA \uc2e0\ub3d9\ube48 \uad50\uc218] \ud14c\ub77c\ud5e4\ub974\uce20\ud30c\uc5d0\uc758\ud55c HgTe\uc758 \uc704\uc0c1 \uc0c1\uc804\uc774 \uba54\ucee4\ub2c8\uc998 \uaddc\uba85 (Physical Review Letters \ub17c\ubb38\uac8c\uc81c, Editors\u2019 Suggestion)"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1012\" height=\"1024\" src=\"https:\/\/physics.gist.ac.kr\/wp-content\/uploads\/2024\/01\/ES_image-1012x1024.jpg\" alt=\"\" class=\"wp-image-9568\" title=\"\" srcset=\"https:\/\/physics.gist.ac.kr\/wp-content\/uploads\/2024\/01\/ES_image-1012x1024.jpg 1012w, https:\/\/physics.gist.ac.kr\/wp-content\/uploads\/2024\/01\/ES_image-297x300.jpg 297w, https:\/\/physics.gist.ac.kr\/wp-content\/uploads\/2024\/01\/ES_image-768x777.jpg 768w, https:\/\/physics.gist.ac.kr\/wp-content\/uploads\/2024\/01\/ES_image.jpg 1920w\" sizes=\"(max-width: 1012px) 100vw, 1012px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center\"><em>\ud14c\ub77c\ud5e4\ub974\uce20\ud30c\uc5d0 \uc758\ud574 \uc57c\uae30\ub41c Weyl points<\/em><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\ube5b\uacfc \ubb3c\uc9c8 \uac04 \uc0c1\ud638\uc791\uc6a9\uc740 \uc591\uc790 \uace0\uccb4\uc5d0\uc11c \ud3c9\ud615\uc744 \ubc97\uc5b4\ub09c \uc0c1\ud0dc\ub97c \uc77c\uc73c\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud2b9\ud788 nonlinear phononics\ub294 \ud3c9\ud615 \uc0c1\ud0dc\uac00 \uc544\ub2cc \uc0c1\ud0dc\uc5d0\uc11c \uc900\uc548\uc815 \uc0c1\ud0dc\ub97c \uc2e4\ud604\ud558\ub294 \uac00\uc7a5 \ud6a8\uacfc\uc801\uc778 \uc811\uadfc \ubc29\ubc95 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \ubcf8 \uc5f0\uad6c\uc5d0\uc11c\ub294 \ud655\uc7a5\ub41c \uc81c\uc77c\uc6d0\ub9ac \ubd84\uc790\ub3d9\uc5ed\ud559 \ubc29\ubc95\uc744 \ud1b5\ud574 HgTe \ud654\ud569\ubb3c \uacc4\uc5f4\uc758 \ubb3c\uc9c8\uc5d0\uc11c \ube5b\uc5d0 \uc758\ud574 \uc57c\uae30\ub418\ub294 \uc900\uc548\uc815 \uad6c\uc870\ub97c \uc608\uce21\ud588\uc2b5\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 IR-active \ubaa8\ub4dc\uc758 excitation\uc774 \uc6d0\uc790 \uad6c\uc870\uc758 \ubcc0\ud615\uc744 \uc218 \ud53c\ucf54\ucd08\ub85c \uc720\uc9c0\ud558\ub294 \uac83\uc744 \ubcf4\uc600\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc900\uc548\uc815\ub41c \ubcc0\ud615 \uad6c\uc870\uc5d0\uc11c \ud398\ub974\ubbf8 \uc5d0\ub108\uc9c0 \uc218\uc900\uc5d0\uc11c \ub124 \uac1c\uc758 Weyl \ud3ec\uc778\ud2b8\uac00 \ud615\uc131\ub418\uc5b4, \uc774\uc0c1\uc801\uc778 \uc900\uc548\uc815\ub41c Weyl \ubc18\uae08\uc18d\uc774 \ub428\uc744 \ud655\uc778 \ud558\uc600\uc2b5\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 \uc900\uc548\uc815\ub41c \uc0c1\ud0dc\uac00 \ud398\ub974\ubbf8 \uc544\ud06c \ud45c\uba74 \uc0c1\ud0dc\uc758 ARPES \uce21\uc815 \ub610\ub294 \ube44\uc120\ud615 \ud640 \ud6a8\uacfc\uc758 ultrafast pump&amp;prove \uce21\uc815\uc744 \ud1b5\ud574 \ud655\uc778\ub420 \uc218 \uc788\ub2e4\uace0 \uc81c\uc548\ud558\uc600\uc2b5\ub2c8\ub2e4. \ubcf8 \uc5f0\uad6c\ub294 Physical Review Letters\uc5d0 2024\ub144 1\uc6d4 3\uc77c \uac8c\uc7ac\ub418\uc5c8\uace0, Editors\u2019 Suggestion\uc5d0 \uc120\uc815 \ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Interactions between light and matter allow the realization of out-of-equilibrium states in quantum solids. In particular, nonlinear phononics is one of the most efficient approaches to realizing the stationary electronic state in nonequilibrium. Herein, by an extended<em>abinitio<\/em>molecular dynamics method, we identify that long-lived light-driven quasistationary geometry could stabilize the topological nature in the material family of HgTe compounds. We show that coherent excitation of the infrared-active phonon mode results in a distortion of the atomic geometry with a lifetime of several picoseconds. We show that four Weyl points are located exactly at the Fermi level in this nonequilibrium geometry, making it an ideal long-lived metastable Weyl semimetal. We propose that such a metastable topological phase can be identified by photoelectron spectroscopy of the Fermi arc surface states or ultrafast pump-probe transport measurements of the nonlinear Hall effect.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Authors<\/strong>: Dongbin Shin(FA and CA), Angel Rubio(CA), Peizhe Tang(CA)<\/p>\n\n\n\n<p><strong>Publication Date<\/strong>: <em>3 Jan 2024<\/em><\/p>\n\n\n\n<p><strong>Journal Link(DOI): <\/strong>doi.org\/10.1103\/PhysRevLett.132.016603<\/p>\n","protected":false},"featured_media":9568,"template":"","news":[27],"class_list":["post-9567","research_news","type-research_news","status-publish","has-post-thumbnail","hentry","news-research"],"acf":[],"_links":{"self":[{"href":"https:\/\/physics.gist.ac.kr\/en\/wp-json\/wp\/v2\/research_news\/9567","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/physics.gist.ac.kr\/en\/wp-json\/wp\/v2\/research_news"}],"about":[{"href":"https:\/\/physics.gist.ac.kr\/en\/wp-json\/wp\/v2\/types\/research_news"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/physics.gist.ac.kr\/en\/wp-json\/wp\/v2\/media\/9568"}],"wp:attachment":[{"href":"https:\/\/physics.gist.ac.kr\/en\/wp-json\/wp\/v2\/media?parent=9567"}],"wp:term":[{"taxonomy":"news","embeddable":true,"href":"https:\/\/physics.gist.ac.kr\/en\/wp-json\/wp\/v2\/news?post=9567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}