Abstract
The interaction between an atom moving in a model double-well potential and the conduction electrons is treated using renormalization-group methods in next-to-leading logarithmic order. A large number of excited states is taken into account and the Kondo temperature is computed as a function of barrier parameters. We find that for special parameters can be close to 1 K and it can be of the same order of magnitude as the renormalized splitting However, in the perturbative regime we always find that with [I. L. Aleiner et al., Phys. Rev. Lett. 86, 2629 (2001)]. We also find that remains unrenormalized at energies above the Debye frequency,
- Received 4 February 2003
DOI:https://doi.org/10.1103/PhysRevB.68.045114
©2003 American Physical Society