| Issue |
Europhys. Lett.
Volume 69, Number 3, February 2005
|
|
|---|---|---|
| Page(s) | 390 - 396 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10348-5 | |
| Published online | 24 December 2004 | |
Superfluid–Bose-glass transition in two dimensions
at 
: Analytic solution of a mode-coupling toy model
Ural State Technical University - 620002 Ekaterinburg, Russia
Corresponding author: eugene.zenkov@voila.fr
Received:
23
July
2004
Accepted:
16
November
2004
Analytic expression for the memory function and the optical
conductivity of the two-dimensional Bose gas with logarithmic
interaction at 
in the presence of point-like impurities is
obtained within the mode-coupling approximation. Depending on the
value of a dimensionless combination of the model parameters
proportional to the strength of the impurity potential, two
different phases are distinguished, viz the disordered
superfluid and insulator (Bose glass), separated by an
intermediate (quasi)metal state.
PACS: 64.70.Pf – Glass transitions / 67.57.De – Superflow and hydrodynamics / 72.15.Rn – Localization effects (Anderson or weak localization)
© EDP Sciences, 2005
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