当前位置: X-MOL 学术Phys. Rev. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Realizing and Detecting a Topological Insulator in the AIII Symmetry Class
Physical Review Letters ( IF 8.1 ) Pub Date : 2017-09-14 00:00:00 , DOI: 10.1103/physrevlett.119.115301
Carlos G. Velasco , Belén Paredes

Topological insulators in the AIII (chiral unitary) symmetry class lack experimental realization. Moreover, fractionalization in one-dimensional topological insulators has not been yet directly observed. Our work might open possibilities for both challenges. We propose a one-dimensional model realizing the AIII symmetry class which can be realized in current experiments with ultracold atomic gases. We further report on a distinctive property of topological edge modes in the AIII class: in contrast to those in the well-studied BDI (chiral orthogonal) class, they have nonzero momentum. Exploiting this feature we propose a path for the detection of fractionalization. A fermion added to an AIII system splits into two halves localized at opposite momenta, which can be detected by imaging the momentum distribution.

中文翻译:

实现和检测AIII对称等级的拓扑绝缘子

AIII(手性unit)对称性类的拓扑绝缘子缺乏实验实现。而且,还没有直接观察到一维拓扑绝缘体中的分级。我们的工作可能会为这两个挑战打开可能性。我们提出了一个实现AIII对称性类别的一维模型,该模型可以在当前的超冷原子气体实验中实现。我们进一步报告了AIII类中的拓扑边缘模式的独特性质:与经过深入研究的BDI(手性正交)类中的拓扑边缘模式相比,它们具有非零动量。利用此功能,我们提出了一种检测分级的路径。添加到AIII系统的费米子分为两个相反的半部分,可以通过对动量分布进行成像来检测。
更新日期:2017-09-15
down
wechat
bug