Journal
PHYSICAL REVIEW B
Volume 100, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.201406
Keywords
-
Funding
- National key R & D Program of China [2017YFA0303800]
- National Natural Science Foundation of China [91850205, 61421001]
Ask authors/readers for more resources
Recent theoretical studies have extended the Berry phase framework to account for higher electric multipole moments; quadrupole and octupole topological phases have been proposed. Although the two-dimensional quantized quadrupole insulators have been demonstrated experimentally, octupole topological phases have not previously been observed experimentally. Here we report on the experimental realization of a classical analog of the octupole topological insulator in the electric circuit system. Three-dimensional topolectrical circuits for realizing such topological phases are constructed experimentally. We observe octupole topological states protected by the topology of the bulk, which are localized at the corners. Our results provide conclusive evidence of a form of robustness against disorder and deformation, which is characteristic of octupole topological insulators. Our study opens a route toward higher-order topological phenomena in three dimensions and paves the way for employing topolectrical circuitry to study complex topological phenomena.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available