Magneto-electronic properties of graphene nanoribbons with various edge structures passivated by phosphorus and hydrogen atoms

The electronic and magnetic structures of graphene nanoribbons (GNRs) with various edge structures passivated by P atoms are investigated systematically, and compared with H passivation as well. GNRs with the entire reconstructed Klein edge or armchair edge are found to be nonmagnetic regardless of...

Full description

Saved in:
Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2015-10, Vol.17 (37), p.242-2428
Main Authors: Yu, Z. L, Wang, D, Zhu, Z, Zhang, Z. H
Format: Article
Language:English
Subjects:
Atomic properties
Charge transfer
Doping
Electronics
Filtering
Graphene
Nanostructure
Passivation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The electronic and magnetic structures of graphene nanoribbons (GNRs) with various edge structures passivated by P atoms are investigated systematically, and compared with H passivation as well. GNRs with the entire reconstructed Klein edge or armchair edge are found to be nonmagnetic regardless of P or H passivation. However, if the edge of GNRs is a mixture of zigzag edge and reconstructed Klein edge, they are nonmagnetic for H passivation but significantly magnetic for P passivation, which could be attributed to the "charge transfer doping" effect. And the corresponding magnetic device shows a noticeable negative differential resistance phenomenon and an excellent spin filtering effect under AP configuration, which originate from the special energy band structure. The GNRs with zigzag edge, reconstructed Klein edge, or mixed edge shapes are all metals in the nonmagnetic state regardless of the H or P atoms involved. The relationship between the energy gap and the width in armchair-edged GNRs by P passivation with a dimer structure also satisfies the 3p periodicity, but different in detail from the case of H passivation. The calculated edge formation energy indicates that P-passivated GNRs are energetically more favorable, suggesting that they can stably exist in the experiment. Magneto-electronic properties of graphene nanoribbons with various edge structures passivated by P and H is studied. It shows that if the edge of GNRs is a mixture of zigzag edge and reconstructed Klein edge, they are nonmagnetic for H passivation but obviously magnetic for P passivation.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp03927d