摘要
We study the topology and localization properties of a generalized Su–Schrieffer–Heeger(SSH)model with a quasi-periodic modulated hopping.It is found that the interplay of off-diagonal quasi-periodic modulations can induce topological Anderson insulator(TAI)phases and reentrant topological Anderson insulator(RTAI),and the topological phase boundaries can be uncovered by the divergence of the localization length of the zero-energy mode.In contrast to the conventional case that the TAI regime emerges in a finite range with the increase of disorder,the TAI and RTAI are robust against arbitrary modulation amplitude for our system.Furthermore,we find that the TAI and RTAI can induce the emergence of reentrant localization transitions.Such an interesting connection between the reentrant localization transition and the TAI/RTAI can be detected from the wave-packet dynamics in cold atom systems by adopting the technique of momentum-lattice engineering.
基金
supported by the National Natural Science Foundation of China(Grant No.12375016)
the Fundamental Research Program of Shanxi Province,China(Grant No.20210302123442)
Beijing National Laboratory for Condensed Matter Physics(No.2023BNLCMPKF001)
supported by the National Natural Science Foundation of China(No.12074340)
supported by the Natural Science Foundation for Shanxi Province(Grant No.1331KSC).
