Electronic band structure of isotopically pure germanium: Modulated transmission and reflectivity study

C. Parks, A. K. Ramdas, S. Rodriguez, Kohei M Itoh, E. E. Haller

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

The piezomodulated and photomodulated reflectivity spectra of monoisotopic Ge (70Ge, Ge73, Ge74, Ge76) and natural Ge measured at T=6 K show clear signatures of the E0 and the E00 transitions; their energies increase with increasing isotopic mass. From a comparison of the phonon-assisted indirect transition energies obtained from electromodulated and wavelength-modulated transmission and photoluminescence, the isotopic mass dependence of both the indirect gap and the relevant zone-boundary phonons are deduced. The isotopic-mass dependence of the energy gaps is interpreted in the context of the electron-phonon interaction and the volume expansion of the crystal lattice.

Original languageEnglish
Pages (from-to)14244-14250
Number of pages7
JournalPhysical Review B
Volume49
Issue number20
DOIs
Publication statusPublished - 1994
Externally publishedYes

Fingerprint

Germanium
Electron-phonon interactions
Wave transmission
Phonons
Crystal lattices
Band structure
germanium
Photoluminescence
Energy gap
reflectance
Wavelength
electronics
electron phonon interactions
crystal lattices
phonons
signatures
photoluminescence
expansion
energy
wavelengths

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electronic band structure of isotopically pure germanium : Modulated transmission and reflectivity study. / Parks, C.; Ramdas, A. K.; Rodriguez, S.; Itoh, Kohei M; Haller, E. E.

In: Physical Review B, Vol. 49, No. 20, 1994, p. 14244-14250.

Research output: Contribution to journalArticle

Parks, C. ; Ramdas, A. K. ; Rodriguez, S. ; Itoh, Kohei M ; Haller, E. E. / Electronic band structure of isotopically pure germanium : Modulated transmission and reflectivity study. In: Physical Review B. 1994 ; Vol. 49, No. 20. pp. 14244-14250.
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