Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204, USA.
Phys Rev Lett. 2012 Nov 9;109(19):196402. doi: 10.1103/PhysRevLett.109.196402. Epub 2012 Nov 8.
We theoretically investigate the interplay between the fermionic mobile impurity atoms and a Larkin-Ovchinnikov (LO) superfluid in a two dimensional optical lattice. We find that the impurity atoms get localized and can form pairs when the interaction between the impurity atoms and the LO superfluid is strong enough. These features are due to the phenomena of self-localization whose underlying mechanism is revealed by an effective model. The impurity atoms with finite concentrations can drive the transition from a two-dimensional, checkerboardlike LO state to a quasi-one-dimensional, stripelike one. Experimental preparations to observe these features are also discussed.
我们从理论上研究了二维光学晶格中费米子可移动杂质原子与 Larkin-Ovchinnikov（LO）超流之间的相互作用。我们发现，当杂质原子与 LO 超流之间的相互作用足够强时，杂质原子会局域化并形成对。这些特征归因于自局域化现象，其潜在机制由有效模型揭示。具有有限浓度的杂质原子可以驱动从二维棋盘状 LO 态到准一维带状态的转变。我们还讨论了观察这些特征的实验准备。
