Topolectrical-circuit realization of topological corner modes

• Published in: Nature physics Vol. 14; no. 9; pp. 925 - 929
• Main Authors: Imhof, Stefan, Berger, Christian, Bayer, Florian, Brehm, Johannes, Molenkamp, Laurens W., Kiessling, Tobias, Schindler, Frank, Lee, Ching Hua, Greiter, Martin, Neupert, Titus, Thomale, Ronny
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.09.2018; Nature Publishing Group
• Subjects: 639/624/1111; 639/766/1130/2798; 639/766/119; 639/766/119/2792; Atomic; Circuit design; Circuit protection; Circuits; Classical and Continuum Physics; Complex Systems; Condensed Matter Physics; Eigenvalues; Electric bridges; Insulators; Mathematical and Computational Physics; Molecular; Optical and Plasma Physics; Physics; Physics and Astronomy; Quadrupoles; Reflection; Symmetry; Theoretical

Quantized electric quadrupole insulators have recently been proposed as novel quantum states of matter in two spatial dimensions. Gapped otherwise, they can feature zero-dimensional topological corner mid-gap states protected by the bulk spectral gap, reflection symmetries and a spectral symmetry. H...