Topological insulators represent a new phase of matter,characterized by conductive surfaces,while their bulk remains insulating.When the dimension of the system exceeds that of the topological state by at least two,th...Topological insulators represent a new phase of matter,characterized by conductive surfaces,while their bulk remains insulating.When the dimension of the system exceeds that of the topological state by at least two,the insulators are classified as higher-order topological insulators(HOTI).The appearance of higher-order topological states,such as corner states,can be explained by the filling anomaly,which leads to the fractional spectral charges in the unit cell.Previously reported fractional charges have been quite limited in number and size.In this work,based on the two-dimensional(2D)Su-Schrieffer-Heeger model lattice,we demonstrated a new class of HOTIs with adjustable fractional charges that can take any value ranging from 0 to 1,achieved by utilizing the Lorentz transformation.Furthermore,this transformation generates novel bound-state-in-continuum-like corner states,even when the lattice is in a topological trivial phase,offering a new approach to light beam localization.This work paves the way for fabricating HOTIs with diverse corner states that offer promising applicative potential.展开更多
A simple graph G is called a graceful graph if there exists a vertex-label with different integers in the set S={0, 1, 2, …, ε(G)} such that the edge-labels are defined
孤独症谱系障碍是一类以社会交往、沟通困难、行为模式受限或重复为主要表现的心理发育障碍,其病因与脑网络的异常模式有关。非侵入性脑刺激技术可以调节大脑皮质的激活,重塑孤独症谱系障碍患者的脑网络,从而改善行为症状。本文总结了...孤独症谱系障碍是一类以社会交往、沟通困难、行为模式受限或重复为主要表现的心理发育障碍,其病因与脑网络的异常模式有关。非侵入性脑刺激技术可以调节大脑皮质的激活,重塑孤独症谱系障碍患者的脑网络,从而改善行为症状。本文总结了经颅磁刺激(transcranial magnetic stimulation,TMS)和经颅直流电刺激(transcranial direct current stimulation,tDCS)2种非侵入性脑刺激技术对患者行为、认知、言语的影响,评价了非侵入性脑刺激的临床应用前景。展开更多
基金supported by the Natural Science Basic Research Program of Shaanxi Province(No.2024JC-JCQN-06)the National Natural Science Foundation of China(Nos.12474337,12304370)Fundamental Research Funds for the Central Universities(No.xzy012024135).
文摘Topological insulators represent a new phase of matter,characterized by conductive surfaces,while their bulk remains insulating.When the dimension of the system exceeds that of the topological state by at least two,the insulators are classified as higher-order topological insulators(HOTI).The appearance of higher-order topological states,such as corner states,can be explained by the filling anomaly,which leads to the fractional spectral charges in the unit cell.Previously reported fractional charges have been quite limited in number and size.In this work,based on the two-dimensional(2D)Su-Schrieffer-Heeger model lattice,we demonstrated a new class of HOTIs with adjustable fractional charges that can take any value ranging from 0 to 1,achieved by utilizing the Lorentz transformation.Furthermore,this transformation generates novel bound-state-in-continuum-like corner states,even when the lattice is in a topological trivial phase,offering a new approach to light beam localization.This work paves the way for fabricating HOTIs with diverse corner states that offer promising applicative potential.
文摘A simple graph G is called a graceful graph if there exists a vertex-label with different integers in the set S={0, 1, 2, …, ε(G)} such that the edge-labels are defined
文摘孤独症谱系障碍是一类以社会交往、沟通困难、行为模式受限或重复为主要表现的心理发育障碍,其病因与脑网络的异常模式有关。非侵入性脑刺激技术可以调节大脑皮质的激活,重塑孤独症谱系障碍患者的脑网络,从而改善行为症状。本文总结了经颅磁刺激(transcranial magnetic stimulation,TMS)和经颅直流电刺激(transcranial direct current stimulation,tDCS)2种非侵入性脑刺激技术对患者行为、认知、言语的影响,评价了非侵入性脑刺激的临床应用前景。
