{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T16:51:09Z","timestamp":1791910269901,"version":"4.3.4"},"reference-count":51,"publisher":"Wiley","issue":"57","license":[{"start":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T00:00:00Z","timestamp":1786665600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T00:00:00Z","timestamp":1786665600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Zero\u2010thermal\u2010expansion (ZTE) materials are critical for stabilizing device performance under thermal fluctuations. Traditionally, achieving enhanced thermal stability has required three\u2010dimensional (3D) ZTE, a stringent condition that severely limits material availability. Here, we show that low\u2010dimensional ZTE can be realized in single crystals by orienting ubiquitous bond rotations along specific crystallographic axes in the framework structures, thus relaxing the strict requirements for 3D ZTE. This approach enables a two\u2010dimensional ZTE response, as demonstrated in a trigonal YAl\n                    <jats:sub>3<\/jats:sub>\n                    (BO\n                    <jats:sub>3<\/jats:sub>\n                    )\n                    <jats:sub>4<\/jats:sub>\n                    (YAB) crystal, which exhibits an ultralow thermal expansion coefficient of \u22120.02(7) MK\n                    <jats:sup>\u22121<\/jats:sup>\n                    within the\n                    <jats:italic>ab<\/jats:italic>\n                    plane from 83 to 180\u00a0K. The practical impact of this low\u2010dimensional ZTE is evidenced by the thermo\u2010optical performance of YAB crystal: within the ZTE temperature range, the thermo\u2010optical coefficient varies by only 0.03(2)\u00a0\u00d7\u00a010\n                    <jats:sup>\u22128<\/jats:sup>\n                    K\n                    <jats:sup>\u22122<\/jats:sup>\n                    in the ZTE plane, approximately two orders of magnitude lower than those of conventional optical materials. This study establishes a new design strategy for functional ZTE materials and highlights the application potential of dimensionally confined ZTE effects in precision optical and electronic devices.\n                  <\/jats:p>","DOI":"10.1002\/adma.74391","type":"journal-article","created":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T12:37:36Z","timestamp":1786711056000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Low\u2010Dimensional Zero Thermal Expansion Enables Ultrastable Thermo\u2010Optics in YAl\n                    <sub>3<\/sub>\n                    (BO\n                    <sub>3<\/sub>\n                    )\n                    <sub>4<\/sub>\n                    Single Crystal"],"prefix":"10.1002","volume":"38","author":[{"given":"Qin","family":"Chen","sequence":"first","affiliation":[{"name":"Functional Crystals Lab Technical Institute of Physics and Chemistry Chinese Academy of Sciences  Beijing China"},{"name":"Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xingyu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Functional Crystals Lab Technical Institute of Physics and Chemistry Chinese Academy of Sciences  Beijing China"},{"name":"Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xingxing","family":"Jiang","sequence":"additional","affiliation":[{"name":"Functional Crystals Lab Technical Institute of Physics and Chemistry Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Songlin","family":"Liang","sequence":"additional","affiliation":[{"name":"Southwest Institute of Technical Physics  Chengdu Sichuan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8297-0945","authenticated-orcid":false,"given":"Maxim S.","family":"Molokeev","sequence":"additional","affiliation":[{"name":"RUDN University  Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuchao","family":"Li","sequence":"additional","affiliation":[{"name":"Functional Crystals Lab Technical Institute of Physics and Chemistry Chinese Academy of Sciences  Beijing China"},{"name":"Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Youquan","family":"Liu","sequence":"additional","affiliation":[{"name":"Functional Crystals Lab Technical Institute of Physics and Chemistry Chinese Academy of Sciences  Beijing 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