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Berry-phase effects in transport through single Jahn-Teller molecules

Maximilian G. Schultz·Tamara S. Nunner·Felix von Oppen
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Abstract

The vibrational modes of Jahn-Teller molecules are affected by a Berry phase that is associated with a conical intersection of the adiabatic potentials. We investigate theoretically how this Berry phase affects transport through a single $E \otimes e$ Jahn-Teller molecule when the tunneling electrons continually switch the molecule between a symmetric and a Jahn-Teller distorted charge state. We find that the Berry phase in conjunction with a spectral trapping mechanism leads to a current blockade even in regions outside the Coulomb blockade. The blockade is strongly asymmetric in the gate voltage and induces pronounced negative differential conductance.

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Maximilian G. Schultz, Tamara S. Nunner, Felix von Oppen. 2007-12-12. Berry-phase effects in transport through single Jahn-Teller molecules. https://doi.org/10.1103/physrevb.77.075323

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