Chiral Voltage Propagation and Calibration in a Topolectrical Chern Circuit

Tobias Hofmann, Tobias Helbig, Ching Hua Lee, Martin Greiter, and Ronny Thomale
Phys. Rev. Lett. 122, 247702 – Published 21 June 2019
PDFHTMLExport Citation

Abstract

We propose an electric circuit array with topologically protected unidirectional voltage modes at its boundary. Instead of external bias fields or Floquet engineering, we employ negative impedance converters with current inversion (INICs) to accomplish a nonreciprocal, time-reversal symmetry-broken electronic network we call a topolectrical Chern circuit (TCC). The TCC features an admittance bulk gap fully tunable via the resistors used in the INICs, along with a chiral voltage boundary mode reminiscent of the Berry flux monopole present in the admittance band structure. The active circuit elements in the TCC can be calibrated to compensate for dissipative loss.

  • Figure
  • Figure
  • Figure
  • Received 23 November 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.247702

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Tobias Hofmann1,†, Tobias Helbig1,†, Ching Hua Lee2,3, Martin Greiter1, and Ronny Thomale1,*

  • 1Institute for Theoretical Physics and Astrophysics, University of Würzburg, D-97074 Würzburg, Germany
  • 2Department of Physics, National University of Singapore, Singapore 117542, Singapore
  • 3Institute of High Performance Computing, A*STAR, Singapore 138632, Singapore

  • *Corresponding author. rthomale@physik.uni-wuerzburg.de
  • T. Hofmann and T. Helbig equally contributed to this work.

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 122, Iss. 24 — 21 June 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×