Electronic Raman and infrared spectra of acceptors in isotopically controlled diamonds

Journal Article · Mon Jun 01 04:00:00 EDT 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.15315· OSTI ID:636175

Kim, H; Vogelgesang, R; Ramdas, A K; Rodriguez, S ^[1]; Grimsditch, M ^[2]; Anthony, T R ^[3]

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1. Department of Physics, Purdue University, West Lafayette, Indiana 47907-1396 (United States)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. General Electric Company Corporate Research and Development, Schenectady, New York 12309 (United States)

The Lyman spectrum of substitutional boron acceptors in diamonds with natural composition and that in a {sup 13}C diamond exhibit remarkably similar features, but shifted to higher energies in the latter by 0.4{endash}1.5 meV. Additional lines appear when the spectra are recorded as a function of temperature, indicating the thermal population of a level {Delta}{sup {prime}}{approximately}2thinspmeV above the ground state; this can be interpreted as the spin-orbit splitting of the 1s acceptor ground state into 1s(p{sub 3/2}) and 1s(p{sub 1/2}), the latter located {Delta}{sup {prime}} above the former. The Raman-allowed 1s(p{sub 3/2}){r_arrow}1s(p{sub 1/2}) electronic transition is directly observed at 2.07(1) and 2.01(1) meV in the Raman spectrum of natural and {sup 13}C diamond, respectively. Polarization features of the {Delta}{sup {prime}} Raman line reveal that it is predominantly {Gamma}{sub 5} in character, as predicted by a theoretical calculation formulated in terms of the known values of Luttinger parameters. The theoretical expression for the Raman cross section for {Delta}{sup {prime}} enables the acceptor concentration to be deduced from an intercomparison of the intensity of the {Delta}{sup {prime}} line and that of the zone-center optical phonon. The presence of boron acceptors produces a quasicontinuous absorption spectrum in the range of the optical phonon branch, flanked by a sharp feature at the zone-center optical phonon frequency; their appearance can be attributed to the partial breakdown of the translational symmetry and the activation of otherwise inactive vibrations. {copyright} {ital 1998} {ital The American Physical Society}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 636175
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 24 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
BORON ADDITIONS
CARBON 13
DIAMONDS
DOPED MATERIALS
ELECTRONIC STRUCTURE
IMPURITIES
INFRARED SPECTRA
ISOTOPE EFFECTS
PHONONS
RAMAN SPECTRA
SEMICONDUCTOR MATERIALS