Abstract
We calculate the finite-temperature shift of the critical wave vector Qc of the Pokrovsky-Talapov model using a renormalization-group analysis. Separating the Hamiltonian into a part that is renormalized and one that is not, we obtain the flow equations for the stiffness and an arbitrary potential. We then specialize to the case of a cosine potential, and compare our results to well-known results for the sine-Gordon model, to which our model reduces in the limit of vanishing driving wave vector Q=0. Our results may be applied to describe the commensurate-incommensurate phase transition in several physical systems and allow for a more realistic comparison with experiments, which are always carried out at a finite temperature.
| Original language | Undefined/Unknown |
|---|---|
| Pages (from-to) | 245418/1-245418/7 |
| Number of pages | 7 |
| Journal | Physical review. B, Condensed matter and materials physics |
| Volume | 80 |
| Issue number | 24 |
| Publication status | Published - 2009 |