Resonant Raman scattering and exciton-phonon interactions in AgGaSe[sub 2]

Journal Article · Wed Jun 15 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.16407· OSTI ID:7233387

Choi, I ^[1]; Yu, P Y ^[2]

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1. Department of Physics, University of California, Berkeley, California 94720 (United States)
2. Department of Physics, University of California, Berkeley, California 94720 (United States) Materials Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

Enhancements in Raman-scattering cross sections of phonon modes in AgGaSe[sub 2] 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 (Froehlich) interactions in AgGaSe[sub 2] have been determined.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7233387
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:23; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
AMBIENT TEMPERATURE
CHALCOGENIDES
DAMPING
EXCITONS
GALLIUM COMPOUNDS
GALLIUM SELENIDES
INELASTIC SCATTERING
QUASI PARTICLES
RAMAN SPECTRA
RESONANCE SCATTERING
SCATTERING
SELENIDES
SELENIUM COMPOUNDS
SILVER COMPOUNDS
SILVER SELENIDES
SPECTRA
TRANSITION ELEMENT COMPOUNDS