Abstract
A sharplike modulation of the linear electrooptic (LEO) coefficient with pressure (p) and temperature (T) has been observed for the first time. The modulation depth of the LEO (r222)tensor component in the C60−TTF (for the He−Ne laser, λ = 633 nm) was equal to about 2.6%. By varying the applied hydrostatic pressure to up to 15 GPa and the temperature from 4.2 to 25 K, we have unambiguously demonstrated that the observed effect is caused by the incorporation of the TTF moiety. This effect is absent from the unsubstituted fullerenes when the applied hydrostatic pressure is increased to 19 GPa and the temperature varied from 4.2 to 150 K. Norm-conserving self-consistent pseudopotential and molecular dynamics simulations independently reproduce these modulations and attribute them to the electron−vibration interactions associated with the LEO coefficients. The contribution of the interconformational tunneling under the applied pressure and temperature is demonstrated. The data obtained give a possibility for ...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.