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<p>We present a comprehensive study of spin-caloritronic transport in armchair stanene nanoribbons with widths <i>N</i> = 4, 5, and 6, using a tight-binding model combined with the nonequilibrium Green’s function (NEGF) formalism. The system is subjected to a effective exchange field and thermal bias, enabling spin-resolved analysis of density of states, transmission spectra, thermally induced currents, energy-resolved current density, gate-dependent charge and spin currents, and spin polarization. Our results reveal that ribbon width strongly influences electronic and spin transport characteristics: the <i>N</i> = 4 ribbon exhibits sharp spin filtering and high polarization; the <i>N</i> = 5 configuration supports strong thermally driven spin currents and broad gate tunability; and the <i>N</i> = 6 ribbon offers a balanced regime with stable spin response. These findings demonstrate that geometric confinement can be effectively used to tailor spin-caloritronic behavior in stanene nanostructures, providing design guidelines for spintronic and thermoelectric devices based on two-dimensional materials.</p>

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Spin-caloritronic transport in armchair stanene nanoribbons: width-dependent filtering and polarization control

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • Reza Kalami

摘要

We present a comprehensive study of spin-caloritronic transport in armchair stanene nanoribbons with widths N = 4, 5, and 6, using a tight-binding model combined with the nonequilibrium Green’s function (NEGF) formalism. The system is subjected to a effective exchange field and thermal bias, enabling spin-resolved analysis of density of states, transmission spectra, thermally induced currents, energy-resolved current density, gate-dependent charge and spin currents, and spin polarization. Our results reveal that ribbon width strongly influences electronic and spin transport characteristics: the N = 4 ribbon exhibits sharp spin filtering and high polarization; the N = 5 configuration supports strong thermally driven spin currents and broad gate tunability; and the N = 6 ribbon offers a balanced regime with stable spin response. These findings demonstrate that geometric confinement can be effectively used to tailor spin-caloritronic behavior in stanene nanostructures, providing design guidelines for spintronic and thermoelectric devices based on two-dimensional materials.