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Spin-resolved ballistic transport in three-terminal zigzag graphene nanoribbon device.

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Title: Spin-resolved ballistic transport in three-terminal zigzag graphene nanoribbon device.
Authors: Tamuli, Niharika1 (AUTHOR) tamuliniharika8@gmail.com, Acharjee, Saumen1 (AUTHOR) saumenacharjee@dibru.ac.in
Source: Journal of Physics D: Applied Physics. 2026, Vol. 59 Issue 1, p1-17. 17p.
Subjects: Spin polarization, Zeeman effect, Ballistic conduction, Nanoribbons, Magnetoelectronics, Quantum confinement effects
Abstract: We investigate the spin-polarized ballistic transport in a three-terminal Zigzag graphene nanoribbon (ZGNR) device using a tight binding model, non-equilibrium Green function formalism within the Landauer–Büttiker framework. We study the transmission spectrum, density of states, I – V characteristics, spin-resolved conductance and spin current by varying ribbon geometries and an out-of-plane Zeeman field. In absence of magnetization, transport is dominated by subband quantization and resonant edge states, with pronounced dependence on ribbon width and length while the introduction of a Zeeman field offers spin-selective transport and inducing half-metallic behavior, particularly in narrower ribbons, highlighting the interplay between quantum confinement, edge-localized states and spin-dependent interactions. Moreover, we found Fabry–Pérot-like interference in conductance spectrum and bias-driven mode activation with strong spin filtering effects. The spin current is found to be tunable via magnetic field and gate voltage. Also, it remains stable under thermal fluctuations, demonstrating suitability for room-temperature operation. Finally, the energy and width dependence of the Fano factor reveals distinct quantum interference features and spin-polarized transport signatures. These findings indicate the potential of the three-terminal ZGNR based device for scalable and gate-controllable spintronic applications. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 190589810
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PubTypeId: academicJournal
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  Data: Spin-resolved ballistic transport in three-terminal zigzag graphene nanoribbon device.
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  Data: <searchLink fieldCode="AR" term="%22Tamuli%2C+Niharika%22">Tamuli, Niharika</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> tamuliniharika8@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Acharjee%2C+Saumen%22">Acharjee, Saumen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> saumenacharjee@dibru.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Physics+D%3A+Applied+Physics%22">Journal of Physics D: Applied Physics</searchLink>. 2026, Vol. 59 Issue 1, p1-17. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Spin+polarization%22">Spin polarization</searchLink><br /><searchLink fieldCode="DE" term="%22Zeeman+effect%22">Zeeman effect</searchLink><br /><searchLink fieldCode="DE" term="%22Ballistic+conduction%22">Ballistic conduction</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoribbons%22">Nanoribbons</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetoelectronics%22">Magnetoelectronics</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+confinement+effects%22">Quantum confinement effects</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We investigate the spin-polarized ballistic transport in a three-terminal Zigzag graphene nanoribbon (ZGNR) device using a tight binding model, non-equilibrium Green function formalism within the Landauer–Büttiker framework. We study the transmission spectrum, density of states, I – V characteristics, spin-resolved conductance and spin current by varying ribbon geometries and an out-of-plane Zeeman field. In absence of magnetization, transport is dominated by subband quantization and resonant edge states, with pronounced dependence on ribbon width and length while the introduction of a Zeeman field offers spin-selective transport and inducing half-metallic behavior, particularly in narrower ribbons, highlighting the interplay between quantum confinement, edge-localized states and spin-dependent interactions. Moreover, we found Fabry–Pérot-like interference in conductance spectrum and bias-driven mode activation with strong spin filtering effects. The spin current is found to be tunable via magnetic field and gate voltage. Also, it remains stable under thermal fluctuations, demonstrating suitability for room-temperature operation. Finally, the energy and width dependence of the Fano factor reveals distinct quantum interference features and spin-polarized transport signatures. These findings indicate the potential of the three-terminal ZGNR based device for scalable and gate-controllable spintronic applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1088/1361-6463/ae251f
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 17
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    Subjects:
      – SubjectFull: Spin polarization
        Type: general
      – SubjectFull: Zeeman effect
        Type: general
      – SubjectFull: Ballistic conduction
        Type: general
      – SubjectFull: Nanoribbons
        Type: general
      – SubjectFull: Magnetoelectronics
        Type: general
      – SubjectFull: Quantum confinement effects
        Type: general
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      – TitleFull: Spin-resolved ballistic transport in three-terminal zigzag graphene nanoribbon device.
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            NameFull: Tamuli, Niharika
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            NameFull: Acharjee, Saumen
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            – D: 09
              M: 01
              Text: 2026
              Type: published
              Y: 2026
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            – TitleFull: Journal of Physics D: Applied Physics
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