کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1590935 1515477 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Acoustic and optical phonons in metallic diamond
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Acoustic and optical phonons in metallic diamond
چکیده انگلیسی
The dispersion of acoustic and optical phonons in highly boron-doped diamond has been measured by inelastic X-ray scattering at an energy resolution of 6.4 meV. The sample is doped in the metallic regime and shows superconductivity below 4.2 K (midpoint). The data are compared to pure and nitrogen-doped diamond that represent the non-metallic state. No difference is found for the acoustic phonons in the three samples, while the optical phonons show a shift of the dispersion (softening) in qualitative agreement with earlier results from Raman spectroscopy. The presence of boron and nitrogen incorporated into the diamond lattice leads to structural disorder. Evidence for this is found both in the observation of otherwise symmetry-forbidded Bragg intensity at (0 0 2) and intensity from acoustic phonon modes in the vicinity of (0 0 2).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science and Technology of Advanced Materials - Volume 7, Supplement 1, August 2006, Pages S31-S36
نویسندگان
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