کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9585415 | 1505782 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lack of electron-phonon coupling along two-dimensional bands in Bi1âxSbx single crystal alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
From the temperature dependent broadening of high-resolution angle resolved valence band spectra of Bi0.92Sb0.08, we deduce the electron-phonon (e-p) interaction in several bands close to the Fermi level. Our data indicate that the e-p coupling constant λ is highly anisotropic in kâ¥. For a three-dimensional band close to ί we find λ = 0.54 ± 0.03 while the e-p coupling with electrons from a nearby two-dimensional band is only λ = 0.05 ± 0.01. Another two-dimensional highly dispersive and very narrow band with a Fermi momentum of only kF = 0.0084 Ã
â1 close to M¯ in the direction perpendicular to the bisectrix-line is nearly temperature independent. The e-p coupling constant for holes at the bottom of this band at Ei = â24 meV is only λ =0.007 ± 0.005 and does not seem to further increase for holes closer to the Fermi level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 144â147, June 2005, Pages 351-355
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 144â147, June 2005, Pages 351-355
نویسندگان
Hartmut Höchst, Serguei A. Gorovikov,