5 papers
Magnetotransport on quantum spin Hall edge coupled to bulk midgap states
Youjian Chen, Wenjin Zhao, Elliott Runburg +2
We consider magnetotransport on a helical edge of a quantum spin Hall insulator, in the presence of bulk midgap states ``side-coupled" to the edge. In the presence of a magnetic fi…
Electromagnetic response of quantum Hall systems in dimensions five and six and beyond
Ching Hua Lee, Yuzhu Wang, Youjian Chen +1
Quantum Hall (QH) states are arguably the most ubiquitous examples of nontrivial topological order, requiring no special symmetry and elegantly characterized by the first Chern num…
Entangled multi-component 4D quantum Hall states from photonic crystal defects
Xiao Zhang, Youjian Chen, Yuzhu Wang +4
Recently, there has been a drive towards the realization of topological phases beyond conventional electronic materials, including phases defined in more than three dimensions. We…
Non-factorizable 4D quantum Hall state from photonic crystal defects
Xiao Zhang, You Jian Chen, Bochen Guan +3
In the recent years, there has been a drive towards the realization of topological phases beyond conventional electronic materials, including phases defined in more than three dime…
Line nodes, Dirac points and Lifshitz transition in 2D nonsymmorphic photonic crystals
Jun Yu Lin, Nai Chao Hu, You Jian Chen +2
Topological phase transitions, which have fascinated generations of physicists, are always demarcated by gap closures. In this work, we propose very simple 2D photonic crystal latt…