Orso Giuliano
Université Paris Diderot, Sorbonne Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris, France.
Phys Rev Lett. 2017 Mar 10;118(10):105301. doi: 10.1103/PhysRevLett.118.105301. Epub 2017 Mar 6.
We investigate the metal-insulator transition occurring in two-dimensional (2D) systems of noninteracting atoms in the presence of artificial spin-orbit interactions and a spatially correlated disorder generated by laser speckles. Based on a high order discretization scheme, we calculate the precise position of the mobility edge and verify that the transition belongs to the symplectic universality class. We show that the mobility edge depends strongly on the mixing angle between Rashba and Dresselhaus spin-orbit couplings. For equal couplings a non-power-law divergence is found, signaling the crossing to the orthogonal class, where such a 2D transition is forbidden.
我们研究了在存在人工自旋轨道相互作用和由激光散斑产生的空间相关无序的情况下，二维（2D）非相互作用原子系统中发生的金属 - 绝缘体转变。基于一种高阶离散化方案，我们计算了迁移率边的精确位置，并验证该转变属于辛普适类。我们表明，迁移率边强烈依赖于Rashba和Dresselhaus自旋轨道耦合之间的混合角。对于相等的耦合，发现了非幂律发散，这表明转变到了正交类，在该类中这种二维转变是被禁止的。
