Effect of Magnetic Zigzag Edges in Graphene-like Nanoribbons on the Thermoelectric Power Factor

• Authors: S. Krompiewski , G. Cuniberti
• Languages of publication: EN

Abstracts

EN

This study shows that magnetic edge states of graphene-like nanoribbons enhance effectively the thermoelectric performance. This is due to the antiparallel alignment of magnetic moments on opposite zigzag edges and the confinement effect, which jointly lead to the appearance of a gap in the electronic energy spectrum. Consequently, the Seebeck coefficient as well as the thermoelectric power factor get strongly enhanced (with respect to other alignment cases) at room temperature and energies not far away from the charge neutrality point. Moreover the corresponding figure of merit (ZT) is also improved as a result of the reduced electronic thermal conductance.

Keywords

EN

73.63.Kv; 72.25.-b; 73.50.Lw

Discipline

• 72.25.-b: Spin polarized transport(for spin polarized transport devices, see 85.75.-d)
• 73.63.Kv: Quantum dots
• 73.50.Lw: Thermoelectric effects

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 535-537

Dates

published

2018-03

Contributors

author

S. Krompiewski

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

G. Cuniberti

• Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany
• Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany
• Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany

References

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Identifiers

DOI

10.12693/APhysPolA.133.535