Rongcheng Yao, Lingyu Wan, Bingsheng Li, Yuefei Wang
{"title":"Temperature-dependent Raman-active phonon modes and Electron−Phonon Coupling in β-Ga2O3 microwire","authors":"Rongcheng Yao, Lingyu Wan, Bingsheng Li, Yuefei Wang","doi":"10.35848/1882-0786/ad135c","DOIUrl":null,"url":null,"abstract":"\n The lattice vibration and electron-phonon coupling (EPC) in β-Ga2O3 microwire are systematically investigated. The β-Ga2O3 microwire that is (020)-oriented shows 14 Raman peaks, with all the full width at half maximum (FWHM) of them narrower than those of (100)-oriented β-Ga2O3 bulk single crystal. As the temperature increases from 80K to 300K, most Raman-active phonon modes are blueshifted, while a few modes are first blueshifted and then redshifted. The photoluminescence mainly originates from the recombination of self-trapping exciton (STE) and the quantitative analysis reveals that there exists quite strong EPC in β-Ga2O3 microwire and the Huang-Rhys factor is up to Sʹ≈14.","PeriodicalId":8093,"journal":{"name":"Applied Physics Express","volume":"47 24","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics Express","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.35848/1882-0786/ad135c","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
The lattice vibration and electron-phonon coupling (EPC) in β-Ga2O3 microwire are systematically investigated. The β-Ga2O3 microwire that is (020)-oriented shows 14 Raman peaks, with all the full width at half maximum (FWHM) of them narrower than those of (100)-oriented β-Ga2O3 bulk single crystal. As the temperature increases from 80K to 300K, most Raman-active phonon modes are blueshifted, while a few modes are first blueshifted and then redshifted. The photoluminescence mainly originates from the recombination of self-trapping exciton (STE) and the quantitative analysis reveals that there exists quite strong EPC in β-Ga2O3 microwire and the Huang-Rhys factor is up to Sʹ≈14.
期刊介绍：
Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).
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