Topological entanglement entropy of interacting disordered zigzag graphene ribbons

Young Heon Kim, Hye Jeong Lee, S. R.Eric Yang

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Interacting disordered zigzag graphene nanoribbons have fractional charges, are quasi-one-dimensional, and display an exponentially small gap. Our numerical computations showed that the topological entanglement entropy of these systems has a small finite but universal value, independent of the strength of the interaction and the disorder. The result that was obtained for the topological entanglement entropy shows that the disorder-free phase is critical and becomes unstable in the presence of disorder. Our result for the entanglement spectrum in the presence of disorder is also consistent with the presence of a topologically ordered phase.

Original languageEnglish
Article number115151
JournalPhysical Review B
Issue number11
Publication statusPublished - 2021 Mar 29

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (NRF-2018R1D1A1A09082332).

Publisher Copyright:
© 2021 American Physical Society.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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