{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T14:31:42Z","timestamp":1760452302298,"version":"3.41.2"},"reference-count":13,"publisher":"AIP Publishing","issue":"21","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2008,5,26]]},"abstract":"<jats:p>We report on the contribution of optical phonon decay into acoustic phonon to the thermal conductivity [k(T)] of semiconductors. We have considered this mechanism as an acoustic phonon generation rate within the full modified Callaway theory to accurately describe experimental data of k(T) for Ge as a function of isotopic composition. The proposed model requires only one adjustable parameter for each mode. Our approach to describe k(T) in semiconductors is found to provide much better agreement with the experimental results than previously reported models, which did not account for the role of optical phonon.<\/jats:p>","DOI":"10.1063\/1.2937113","type":"journal-article","created":{"date-parts":[[2008,5,28]],"date-time":"2008-05-28T11:20:09Z","timestamp":1211973609000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":21,"title":["Role of optical phonon in Ge thermal conductivity"],"prefix":"10.1063","volume":"92","author":[{"given":"M.","family":"Kazan","sequence":"first","affiliation":[{"name":"University of Aveiro 1 CICECO, Department of Physics, , 3810-193 Aveiro, Portugal"}]},{"given":"S.","family":"Pereira","sequence":"additional","affiliation":[{"name":"University of Aveiro 1 CICECO, Department of Physics, , 3810-193 Aveiro, Portugal"}]},{"given":"J.","family":"Coutinho","sequence":"additional","affiliation":[{"name":"University of Aveiro 2 Department of Physics, , 3810-193 Aveiro, Portugal"}]},{"given":"M. R.","family":"Correia","sequence":"additional","affiliation":[{"name":"University of Aveiro 2 Department of Physics, , 3810-193 Aveiro, Portugal"}]},{"given":"P.","family":"Masri","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Montpellier II 3 Groupe d\u2019Etude des Semiconducteurs, CNRS-UMR 5650, , cc 074, 34095 Montpellier, France"}]}],"member":"317","published-online":{"date-parts":[[2008,5,27]]},"reference":[{"key":"2023072901225922700_c1","doi-asserted-by":"publisher","first-page":"168","DOI":"10.1038\/nature06458","volume":"451","year":"2008","journal-title":"Nature (London)"},{"key":"2023072901225922700_c2","doi-asserted-by":"publisher","first-page":"92","DOI":"10.1103\/RevModPhys.33.92","volume":"33","year":"1961","journal-title":"Rev. Mod. Phys."},{"key":"2023072901225922700_c3","doi-asserted-by":"publisher","first-page":"1046","DOI":"10.1103\/PhysRev.113.1046","volume":"113","year":"1959","journal-title":"Phys. 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