Tunable caging of excitation in decorated Lieb-ladder geometry with long-range connectivity  

作　　者：Atanu Nandy 

机构地区：[1]Department of Physics,Acharya Prafulla Chandra College,New Barrackpore,Kolkata West Bengal-700131,India

出　　处：《Chinese Physics B》2023年第12期489-499,共11页中国物理B（英文版）

摘　　要：Controlled Aharonov-Bohm caging of wave train is reported in a quasi-one-dimensional version of Lieb geometry with next-nearest-neighbor hopping integral within the tight-binding framework.This longer-wavelength fluctuation is considered by incorporating periodic,quasi-periodic or fractal kind of geometry inside the skeleton of the original network.This invites exotic eigenspectrum displaying a distribution of flat band states.Also a subtle modulation of external magnetic flux leads to a comprehensive control over those non-resonant modes.Real space renormalization group method provides us an exact analytical prescription for the study of such tunable imprisonment of excitation.The non-trivial tunability of external agent is important as well as challenging in the context of experimental perspective.

关 键 词：caging flat band INTERFEROMETER RENORMALIZATION 

分 类 号：O469[理学—凝聚态物理]