RESONANT RAMAN-SCATTERING AND EXCITON-PHONON INTERACTIONS IN AGGASE2

被引:18
作者
CHOI, IH
YU, PY
机构
[1] LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720
[2] CHUNG ANG UNIV,DEPT PHYS,SEOUL,SOUTH KOREA
来源
PHYSICAL REVIEW B | 1994年 / 49卷 / 23期
关键词
D O I
10.1103/PhysRevB.49.16407
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Enhancements in Raman-scattering cross sections of phonon modes in AgGaSe2 have been observed both at room temperature and at liquid-nitrogen temperature. At low temperature the observed enhancements can be explained by outgoing resonances of the scattered photons at the lowest-energy free exciton. At resonance, multiphonon modes involving as many as three longitudinal-optical (LO) phonons have been observed. Exciton energy and damping constant and relative strengths of exciton-LO-phonon (Frohlich) interactions in AgGaSe2 have been determined.
引用
收藏
页码:16407 / 16414
页数:8
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