Built-In Electric Field Modulation of Spontaneous Magnetism and Thermospin Transport in Boron-Nitrogen Doped Zigzag Graphene Nanoribbons
Abstract
Zigzag-edged graphene nanoribbons (ZGNRs) host large magnetic moments at two zigzag edges due to spontaneous magnetism, whose ground state is antiferromagnetically coupled spin-order edge state (AF state). In this paper, the spontaneous magnetism and thermoelectricity of ZGNRs with periodic substituted doping of boron and nitrogen atoms along the axial direction are investigated by first principle calculation. The doping induces an internal electric field, which modulates the magnetic moments at the two zigzag edges and the band structure with spin splitting. For varying doping configuration, the ground state could be AF state, ferromagnetically coupled spin-order edge state (FM state), or degenerated pair of AF and FM states. External transversal static electric field can further modulate the magnetic moments and the band structure. By designing the doping configuration and the external field, pure thermal spin current with the absence of thermal charge current can be generated at room temperature, which can be switched on and off by flipping the magnetic configuration between AF and FM states. Thus, the doped ZGNRs can be applied as prototype devices for spin-caloritronic.
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BibTeX
@misc{luo2026builtin,
title = {{Built-In Electric Field Modulation of Spontaneous Magnetism and Thermospin Transport in Boron-Nitrogen Doped Zigzag Graphene Nanoribbons}},
author = {Ma Luo and Yiyi Xie and Xinxiu Wu},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.03476},
eprint = {2609.03476},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.03476},
}
RIS
TY - UNPB
TI - Built-In Electric Field Modulation of Spontaneous Magnetism and Thermospin Transport in Boron-Nitrogen Doped Zigzag Graphene Nanoribbons
AU - Ma Luo
AU - Yiyi Xie
AU - Xinxiu Wu
PY - 2026
DA - 2026/09/03
PB - arXiv
DO - 10.48550/arxiv.2609.03476
UR - https://arxiv.org/abs/2609.03476
AB - Zigzag-edged graphene nanoribbons (ZGNRs) host large magnetic moments at two zigzag edges due to spontaneous magnetism, whose ground state is antiferromagnetically coupled spin-order edge state (AF state). In this paper, the spontaneous magnetism and thermoelectricity of ZGNRs with periodic substituted doping of boron and nitrogen atoms along the axial direction are investigated by first principle calculation. The doping induces an internal electric field, which modulates the magnetic moments at the two zigzag edges and the band structure with spin splitting. For varying doping configuration, the ground state could be AF state, ferromagnetically coupled spin-order edge state (FM state), or degenerated pair of AF and FM states. External transversal static electric field can further modulate the magnetic moments and the band structure. By designing the doping configuration and the external field, pure thermal spin current with the absence of thermal charge current can be generated at room temperature, which can be switched on and off by flipping the magnetic configuration between AF and FM states. Thus, the doped ZGNRs can be applied as prototype devices for spin-caloritronic.
ER -