Abstract
We examine the contribution of a deformation potential interaction to electric field gra dients (EFG) and following quadrupole splitting (Q.S.) in the ground state through the comparison of EFG in the case of no deformation potential interaction, using Green function evaluated with the first order perturbation calculation. The potential V(R) and EFG are derived from the preceding Green function. From theoretical results, it is known that en hancement of EFG is caused by a deformation potential interaction and is proportional to the number of phonons around a conduction electron (= (Nph ))' The temperature dependence of V(R), as deduced from the thermal Green function, shows that the EFG increases with temperature. Experimentally, we apply these theoretical results to the Q.S. of a transition metaldoped f3 - FeSb, especially focusing on that of Co-doped f3 - FeSb. As a result, we obtain (Nph) rv 0.07 for Co-doped f3 - FeSi 2 , which is relatively large in comparison with that for a typical covalent semiconductor. Compared with (Nph) for a Ni-doped specimen, the effective mass of a conduction electron is considered to be relatively large in the Co-doped specimen.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
