PHOTOACOUSTIC SPECTRA OF SI WAFERS AT LIQUID-HELIUM TEMPERATURE

被引：4

作者：

MATSUYAMA, H ^{[1
]}

IKARI, T ^{[1
]}

YOKOYAMA, H ^{[1
]}

FUTAGAMI, K ^{[1
]}

机构：

[1] MIYAZAKI UNIV,DEPT ELECTR,MIYAZAKI 88921,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1995年 / 34卷 / 5B期

关键词：

PHOTOACOUSTIC SPECTRA; NONRADIATIVE RECOMBINATION; FREE EXCITON; MOMENTUM-CONSERVING PHONON; ELECTRON-HOLE DROP;

D O I：

10.1143/JJAP.34.2904

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photoacoustic (PA) measurements of p- and n-type Si single crystals are carried out at liquid helium temperature (4.2 K). Two small peaks around 1.2 eV are observed in both samples. The energy of the higher-energy peak at 1.21 eV agrees with the thresholds of free exciton absorption with the emission of TO momentum-conserving phonons. The lower-energy peak shifts to the higher energy side with the decrease of the excitation Light intensity. The possibility of the formation of an electron-hole drop for the lower energy peak will be discussed to explain the experimental results.

引用

页码：2904 / 2906

页数：3

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