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Spectroscopic detectability of the molecular Aharonov-Bohm effect.
1Soreq NRC, Yavne 81800, Israel and Ariel University Center, Ariel 40700, Israel.
The Journal of Chemical Physics
|January 17, 2016
Summary
This study reveals M-shaped emission spectra in excited Jahn-Teller states due to Berry-phase factors. This unique spectral dip offers a novel spectroscopic manifestation of the molecular Aharonov-Bohm effect.
Area of Science:
- * Condensed Matter Physics
- * Quantum Chemistry
- * Spectroscopy
Background:
- * Jahn-Teller (JT) states are crucial in understanding vibronic interactions in molecules and solids.
- * Berry-phase effects, typically observed in quantum mechanics, can influence observable phenomena.
- * Emission spectroscopy provides insights into electronic and vibrational states of materials.
Purpose of the Study:
- * To theoretically investigate the emission spectra of systems exhibiting excited Jahn-Teller states with periodic ion trajectories.
- * To elucidate the role of the Berry-phase factor in shaping these spectra.
- * To explore the implications of nonlinear vibronic coupling and propose experimental verification.
Main Methods:
- * Theoretical analysis of emission spectra from excited Jahn-Teller states.
- * Calculation of the Berry-phase factor's influence on spectral shape.
- * Modeling the effects of nonlinear vibronic coupling.
Main Results:
- * Predicted M-shaped emission spectra resulting from the sign change in the Berry-phase factor.
- * Identification of a weak spectral sideline.
- * Calculated effects of nonlinear vibronic coupling on the spectral features.
- * The dip in the M-shaped line is a novel spectroscopic signature.
Conclusions:
- * The Berry-phase factor directly causes the M-shaped emission spectra in the studied Jahn-Teller systems.
- * The observed spectral dip is a unique manifestation of the molecular Aharonov-Bohm effect.
- * Experimental verification on systems like R'-centers in LiF is proposed to confirm these theoretical findings.
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