{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T11:10:15Z","timestamp":1790766615840,"version":"4.1.0"},"reference-count":0,"publisher":"IOP Publishing","license":[{"start":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T00:00:00Z","timestamp":1736380800000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T00:00:00Z","timestamp":1736380800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"funder":[{"DOI":"10.13039\/501100001409","name":"Department of Science and Technology, Ministry of Science and Technology, India","doi-asserted-by":"publisher","award":["CRG\/2023\/001100"],"award-info":[{"award-number":["CRG\/2023\/001100"]}],"id":[{"id":"10.13039\/501100001409","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001409","name":"Department of Science and Technology, Ministry of Science and Technology, India","doi-asserted-by":"publisher","award":["EMR\/2016\/005437"],"award-info":[{"award-number":["EMR\/2016\/005437"]}],"id":[{"id":"10.13039\/501100001409","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001409","name":"Department of Science and Technology, Ministry of Science and Technology, India","doi-asserted-by":"publisher","award":["SRG\/2019\/000674"],"award-info":[{"award-number":["SRG\/2019\/000674"]}],"id":[{"id":"10.13039\/501100001409","id-type":"DOI","asserted-by":"publisher"}]},{"name":"CSIR-Human Resource Development Group (HRDG), Government of India","award":["09\/080(1109)\/2019-EMR-I"],"award-info":[{"award-number":["09\/080(1109)\/2019-EMR-I"]}]},{"name":"CSIR, Goverment of India","award":["09\/080(1109)\/2019-EMR-I"],"award-info":[{"award-number":["09\/080(1109)\/2019-EMR-I"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Phys.: Condens. Matter"],"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>The breaking of inversion symmetry combined with spin-orbit coupling, can give rise to intrigu-&amp;#xD;ing quantum phases and collective excitations. Here, we report systematic temperature dependent&amp;#xD;Raman scattering and theoretical calculations of phonon modes across the inversion symmetry-&amp;#xD;breaking structural transitions in a quasi-one-dimensional compound (TaSe4)3I. Our investigation&amp;#xD;revealed the emergence of three additional Raman-active modes in Raman spectra of the low-&amp;#xD;temperature (LT) non-centrosymmetric (NC) structure of the material. From polarization depen-&amp;#xD;dent Raman spectra and phonon mode symmetry analysis, we have identified the origin of these&amp;#xD;three newly appeared additional Raman-active modes. Notably, two of these modes become Raman&amp;#xD;active due to the loss of inversion symmetry, while the third mode is identified as a soft phonon mode,&amp;#xD;arising from the distinctive vibrational motion of tantalum (Ta) atoms along the -Ta-Ta- chains.&amp;#xD;Furthermore, the temperature evolution of self-energy parameters indicates significant changes in&amp;#xD;the characteristics of the Raman modes across the transition. Latent heat measurements near the&amp;#xD;phase transition using Differential Scanning Calorimetry (DSC) confirm the first-order nature of&amp;#xD;the transition. Theoretical analysis, including group theory and modeling, reaffirms the displacive&amp;#xD;first-order nature of the structural transition. Our findings establish (TaSe4)3I as a model quasi-&amp;#xD;one-dimensional system with broken inversion symmetry facilitated through a displacive first-order&amp;#xD;structural transition.<\/jats:p>","DOI":"10.1088\/1361-648x\/ada843","type":"journal-article","created":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T22:58:05Z","timestamp":1736463485000},"source":"Crossref","is-referenced-by-count":1,"title":["Raman signatures of inversion symmetry breaking structural transition in quasi-1D compound, (TaSe4)3I"],"prefix":"10.1088","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8326-0737","authenticated-orcid":false,"given":"Arnab","family":"Bera","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Partha Sarathi","family":"Rana","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1686-2441","authenticated-orcid":false,"given":"Suman Kalyan","family":"Pradhan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mainak","family":"Palit","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Surabhi","family":"Saha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sk","family":"Kalimuddin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4074-398X","authenticated-orcid":false,"given":"Satyabrata","family":"Bera","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4781-1463","authenticated-orcid":false,"given":"Tuhin","family":"Debnath","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soham","family":"Das","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deep Singha","family":"Roy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Subhadeep","family":"Datta","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1282-1581","authenticated-orcid":false,"given":"Mintu","family":"Mondal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2025,1,9]]},"container-title":["Journal of Physics: Condensed Matter"],"original-title":[],"link":[{"URL":"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-648X\/ada843","content-type":"text\/html","content-version":"am","intended-application":"text-mining"},{"URL":"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-648X\/ada843\/pdf","content-type":"application\/pdf","content-version":"am","intended-application":"text-mining"},{"URL":"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-648X\/ada843\/pdf","content-type":"application\/pdf","content-version":"am","intended-application":"syndication"},{"URL":"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-648X\/ada843\/pdf","content-type":"application\/pdf","content-version":"am","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T22:58:09Z","timestamp":1736463489000},"score":1,"resource":{"primary":{"URL":"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-648X\/ada843"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,1,9]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1088\/1361-648x\/ada843","relation":{},"ISSN":["0953-8984","1361-648X"],"issn-type":[{"value":"0953-8984","type":"print"},{"value":"1361-648X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,1,9]]}}}