I would like to know how following changes in atomic structure of a specific material such as MoTe2 can affect its Raman spectrum?
Introducing vacancies of Te
Doping of Se or S (smaller atomic size) or Po (larger atomic size) instead of some portion of Te
how these changes specifically can change the Raman spectrum of MoTe2?
I appreciate it if any body can answer my question and introduce me a reference book to study more about fundamental of Raman spectrometer which explain interpretation of Raman spectrometer with details and examples.
Raman is a vibrational spectroscopic method and therefore affected by material strain. All modifications you listed would modify the strain and so all should have some extent of influence. This work investigates the strain vs. the shift:
Article Strain-induced vibrational properties of few layer black pho...
The intensity is mostly determined by |dα/dR|², which is the change of the polarizability α with respect to a normal coordinate R. Doping should affect the polarizability, so changes would be expectable, as well. Please note that absolute intensities may be tricky to investigate properly because of focussing issues, but relative band intensities may be decently accessible.
If the peak widens, that may be an indicator for material inhomogeneity, e.g. differently strained domains.
A good introduction to the general method is e.g. given by P.Bernath's spectroscopy textbook.
Many thanks Jürgen Weippert for your answer. I got some idea about what happens.
I started to read "Introductory Raman Spectroscopy (Second edition) Elsevier, 2003 Author: John R. Ferraro, Kazuo Nakamoto and Chris W. Brown
because I need to know the fundamental of Raman spectrum do you think this reference can be useful as well?
the textbook that you introduce to me is the following text book?
Spectra of Atoms and Molecules Hardcover – 1 April 2005
by Peter F. Bernath
I do not know that book, but it sounds like it should do the job.
Yes, that's the reference I was talking about, but since it's a general book, it probably won't go more into details than the books you already have.
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