β-Ga2O3微线中随温度变化的拉曼主动声子模式和电子-声子耦合

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2023-12-07 DOI:10.35848/1882-0786/ad135c

Rongcheng Yao, Lingyu Wan, Bingsheng Li, Yuefei Wang

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引用次数: 0

摘要

系统地研究了β-Ga2O3微线中的晶格振动和电子-声子耦合。(020)取向的β-Ga2O3微丝有14个拉曼峰，其中所有的半峰全宽(FWHM)都比(100)取向的β-Ga2O3体单晶窄。当温度从80K升高到300K时，大多数拉曼有源声子模式发生蓝移，少数模式先蓝移后红移。β-Ga2O3微丝的光致发光主要来源于自俘获激子(STE)的重组，定量分析表明β-Ga2O3微丝中存在较强的EPC, Huang-Rhys因子高达S′≈14。

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Temperature-dependent Raman-active phonon modes and Electron−Phonon Coupling in β-Ga2O3 microwire

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.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

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).