Semiconducting ${α'}$-borophene nanoribbon for high-efficiency spin-Seebeck diodes
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909434209370112 |
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| author | Ghasemzadeh, F. Farokhnezhad, M. Esmaeilzadeh, M. |
| author_facet | Ghasemzadeh, F. Farokhnezhad, M. Esmaeilzadeh, M. |
| contents | The semiconductiong ${α'}$-borophene nanoribbon (${α'}$-BNR) due to its incredible properties such as high stability and great mobility of carriers demostrates high-efficiency in thermoelectric devices. These properties enable us to produce the spin current by a temperature gradient with lower energy consumption technology. In this research, the spin-dependent Seebeck effects are studied in a zigzag ${α'}$-borophene nanoribbon with two leads magnetized by ferromagnetic (FM) insulators. The thermoelectric calculations are performed for a ${α'}$-BNR FM/Normal/FM junction using the tight-binding (TB) formalism in combination with the non-equilibrium Green's function method (NEGF). A pure spin-dependent current due to the breaking of the electron-hole symmetry is induced in the system by a temperature gradient so that it can act as a spin-Seebeck diode. Moreover, the negative differential spin-Seebeck effect can be observed in this device dueto the compensation of thermal spin in the spin-dependent currents. Finally, we have studied the effect of temperature on the charge and spin power factors in ${α'}$-BNR. A significant decline in power factor is primarily arises from a reduction in the magnitude of thermopower near the Fermi level. Our findings demonstrate that the ${α'}$-BNR has a higher power factor compared to its rivals e.g., graphene and silicene. This is attributed to the semiconducting nature and high asymmetry between electrons and holes in the ${α'}$-BNR. The exceptional features of ${α'}$-BNR makes it a very suitable choice for using in thermoelectric devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14840 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Semiconducting ${α'}$-borophene nanoribbon for high-efficiency spin-Seebeck diodes Ghasemzadeh, F. Farokhnezhad, M. Esmaeilzadeh, M. Mesoscale and Nanoscale Physics The semiconductiong ${α'}$-borophene nanoribbon (${α'}$-BNR) due to its incredible properties such as high stability and great mobility of carriers demostrates high-efficiency in thermoelectric devices. These properties enable us to produce the spin current by a temperature gradient with lower energy consumption technology. In this research, the spin-dependent Seebeck effects are studied in a zigzag ${α'}$-borophene nanoribbon with two leads magnetized by ferromagnetic (FM) insulators. The thermoelectric calculations are performed for a ${α'}$-BNR FM/Normal/FM junction using the tight-binding (TB) formalism in combination with the non-equilibrium Green's function method (NEGF). A pure spin-dependent current due to the breaking of the electron-hole symmetry is induced in the system by a temperature gradient so that it can act as a spin-Seebeck diode. Moreover, the negative differential spin-Seebeck effect can be observed in this device dueto the compensation of thermal spin in the spin-dependent currents. Finally, we have studied the effect of temperature on the charge and spin power factors in ${α'}$-BNR. A significant decline in power factor is primarily arises from a reduction in the magnitude of thermopower near the Fermi level. Our findings demonstrate that the ${α'}$-BNR has a higher power factor compared to its rivals e.g., graphene and silicene. This is attributed to the semiconducting nature and high asymmetry between electrons and holes in the ${α'}$-BNR. The exceptional features of ${α'}$-BNR makes it a very suitable choice for using in thermoelectric devices. |
| title | Semiconducting ${α'}$-borophene nanoribbon for high-efficiency spin-Seebeck diodes |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2412.14840 |