Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session M60: Symmetry and Topological Superconductivity
11:15 AM–2:15 PM,
Wednesday, March 4, 2020
Room: Mile High Ballroom 4A
Sponsoring
Unit:
DMP
Chair: Shinsei Ryu, University of Chicago
Abstract: M60.00005 : Majorana fermions in narrow zigzag honeycomb nanoribbons*
Presenter:
Marcos Figueira
(Physics Department, Federal Fluminense University)
Authors:
Renan Bento Ribeiro Campos
(Physics Department, Federal Fluminense University)
Jorge Huamani Correa
(Physics Department, Brasilia Federal University)
Antonio Carlos Seridonio
(Physics Department, Paulista State University (Unesp))
Marcos Figueira
(Physics Department, Federal Fluminense University)
Collaboration:
R. C. Bento Ribeiro, J. H. Correa, A. C. Seridonio, M. S. Figueira
We present results of the band structure, density of states and conductance for the infinite case as well as the energy spectrum as a function of the chemical potential for the finite one. In the infinite case, the band structure exhibits several topological phase transitions associated with spin-up or spin-down Majorana fermions. The results for the finite ZHNR show an energy spectrum with zero-energy modes at the chemical potential, which are the signature of Majorana fermions. A striking result of the work is that the nanoribbon spins polarize the Majorana fermions, generating regions of chemical potential where there are only spin-up or spin-down zero-energy modes. The results show that the system could develop Majorana half-metallic behavior.
[1] J. H. Correa et.al. PRB 98, 045419 (2018).
*We thank Brazilian agencies CAPES and CNPq to support this work.
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