Abstract
We numerically compute the density of states (DOS) of interacting disordered zigzag graphene nanoribbon (ZGNR) having midgap states showing e/2 fractional edge charges. The computed Hartree-Fock DOS is linear at the critical disorder strength where the gap vanishes. This implies an I-V curve of I∝V2. Thus, I-V curve measurement may yield evidence of fractional charges in interacting disordered ZGNR. We show that even a weak disorder potential acts as a singular perturbation on zigzag edge electronic states, producing drastic changes in the energy spectrum. Spin-charge separation and fractional charges play a key role in the reconstruction of edge antiferromagnetism. Our results show that an interacting disordered ZGNR is a topologically ordered Mott-Anderson insulator.
Original language | English |
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Article number | 033109 |
Journal | Physical Review Research |
Volume | 2 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2020 Jul |
Bibliographical note
Publisher Copyright:© 2020 authors.
ASJC Scopus subject areas
- Physics and Astronomy(all)