{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T09:47:18Z","timestamp":1791884838410,"version":"4.3.4"},"reference-count":46,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T00:00:00Z","timestamp":1791849600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T00:00:00Z","timestamp":1791849600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100010446","name":"Institute for Basic Science","doi-asserted-by":"publisher","award":["IBS\u2010R011\u2010D1"],"award-info":[{"award-number":["IBS\u2010R011\u2010D1"]}],"id":[{"id":"10.13039\/501100010446","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Quasi\u2010covalent interlayer bonding in 1T\u2010PtS\n                    <jats:sub>2<\/jats:sub>\n                    gives rise to pronounced thickness\u2010dependent optical and electronic properties, yet its impact on vibrational properties remains poorly understood. In particular, low\u2010frequency interlayer vibrations probe directional restoring forces, but the shear and breathing components have not been independently identified in 1T\u2010PtS\n                    <jats:sub>2<\/jats:sub>\n                    . In this work, nearly degenerate in\u2010plane shear modes and out\u2010of\u2010plane layer\u2010breathing modes in few\u2010layer 1T\u2010PtS\n                    <jats:sub>2<\/jats:sub>\n                    are resolved using circularly polarized Raman spectroscopy. Helicity selection rules separate E\u2010symmetry in\u2010plane vibrations from A\u2010symmetry out\u2010of\u2010plane vibrations, enabling independent extraction of shear and breathing force constants with a linear chain model. The extracted values are nearly identical, in sharp contrast to conventional van der Waals layered materials, where the breathing response is typically much stiffer than the shear response. The same helicity\u2010resolved spectra further clarify the Davydov splitting of high\u2010frequency intralayer modes and reveal additional E\u2010symmetry features tentatively assigned to second\u2010order combination modes. These findings show that strong interlayer bonding in 1T\u2010PtS\n                    <jats:sub>2<\/jats:sub>\n                    underlies a nearly isotropic interlayer force landscape, providing a vibrational basis for its thickness\u2010tunable optoelectronic and phononic functionality.\n                  <\/jats:p>","DOI":"10.1002\/smll.76236","type":"journal-article","created":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T09:08:01Z","timestamp":1791882481000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Identifying Degenerate Shear and Layer Breathing Modes in Few\u2010Layer 1T\u2010PtS\n                    <sub>2<\/sub>\n                    by Circularly Polarized Raman Spectroscopy"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-5894-2994","authenticated-orcid":false,"given":"Byeong Wook","family":"Cho","sequence":"first","affiliation":[{"name":"Center for Integrated Nanostructure Physics (CINAP) Institute for Basic Science (IBS) Sungkyunkwan University  Suwon Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jina","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Energy Science Sungkyunkwan University  Suwon Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Duhee","family":"Yoon","sequence":"additional","affiliation":[{"name":"Center for Integrated Nanostructure Physics (CINAP) Institute for Basic Science (IBS) Sungkyunkwan University  Suwon Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7403-8157","authenticated-orcid":false,"given":"Young Hee","family":"Lee","sequence":"additional","affiliation":[{"name":"Center for Integrated Nanostructure Physics (CINAP) Institute for Basic Science (IBS) Sungkyunkwan University  Suwon Republic of Korea"},{"name":"Center for Low\u2010Dimensional Quantum Materials Hubei University of Technology (HBUT)  Wuhan People's Republic of China"},{"name":"School of Materials Science and Engineering Peking University  Beijing People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,13]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1102896"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/nl903868w"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.105.136805"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/nn1003937"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.3938\/jkps.55.1299"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.5b03615"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms5458"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41565\u2010023\u201001335\u20100"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41563\u2010017\u20100012\u20102"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201504572"},{"issue":"1","key":"e_1_2_9_12_1","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1038\/s41699-018-0085-z","article-title":"Thickness Dependent Electronic Properties of Pt Dichalcogenides","volume":"3","author":"Villaos R. 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