343 citations · 1.4k across the 38 of their papers we have counts for
7 papers · 1 filter
Semiconductor Meta-Graphene and Valleytronics
Praveen Pai, Aron W. Cummings, Alexander Cerjan +3
Nano-patterned semiconductor interfaces offer a versatile platform for creating quantum metamaterials and exploring novel electronic phenomena. In this study, we illustrate this co…
Dimensional crossover of class D real-space topological invariants
Martin Rodriguez-Vega, Terry A. Loring, Alexander Cerjan
The topological properties of a material depend on its symmetries, parameters, and spatial dimension. Changes in these properties due to parameter and symmetry variations can be un…
Classification of Fragile Topology Enabled by Matrix Homotopy
Ki Young Lee, Stephan Wong, Sachin Vaidya +2
The moire flat bands in twisted bilayer graphene have attracted considerable attention not only because of the emergence of correlated phases but also due to their nontrivial topol…
Topological phenomena in artificial quantum materials revealed by local Chern markers
Catalin D. Spataru, Wei Pan, Alexander Cerjan
A striking example of frustration in physics is Hofstadter's butterfly, a fractal structure that emerges from the competition between a crystal's lattice periodicity and the magnet…
Probing topology in nonlinear topological materials using numerical -theory
Stephan Wong, Terry A. Loring, Alexander Cerjan
Nonlinear topological insulators have garnered substantial recent attention as they have both enabled the discovery of new physics due to interparticle interactions, and may have a…
Revealing Topology in Metals using Experimental Protocols Inspired by -Theory
Wenting Cheng, Alexander Cerjan, Ssu-Ying Chen +3
Topological metals are special conducting materials with gapless band structures and nontrivial edge-localized resonances, whose discovery has proved elusive because the traditiona…
Local invariants identify topology in metals and gapless systems
Alexander Cerjan, Terry A. Loring
Although topological band theory has been used to discover and classify a wide array of novel topological phases in insulating and semi-metal systems, it is not well-suited to iden…