Optimal half-metal band structure for large thermoelectric performance
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866929602768666624 |
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| author | Rahangiar, Finantius E. M. Cahaya, Adam B. Muntini, Melania S. Anshori, Isa Hasdeo, Eddwi H. |
| author_facet | Rahangiar, Finantius E. M. Cahaya, Adam B. Muntini, Melania S. Anshori, Isa Hasdeo, Eddwi H. |
| contents | Half-metal ferromagnets were predicted [in IEEE Trans. Mag. 51, 1 (2015)] to give large thermoelectric performance in anti-parallel spin valve configuration. Despite being metals that suffer from the Wiedemann-Franz law, the additional spin degrees of freedom allow for tuning of the thermoelectric properties due to the spin-valve enhancement factor (SVEF). We test this theory and find a mismatch of parameters that gives large TE performance and large SVEF. As a result, we show that the spin-valve setup is useful only for gapless HMF with initially poor TE performance. To obtain the largest TE performance, one still needs to open the band gap. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_13140 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Optimal half-metal band structure for large thermoelectric performance Rahangiar, Finantius E. M. Cahaya, Adam B. Muntini, Melania S. Anshori, Isa Hasdeo, Eddwi H. Mesoscale and Nanoscale Physics Half-metal ferromagnets were predicted [in IEEE Trans. Mag. 51, 1 (2015)] to give large thermoelectric performance in anti-parallel spin valve configuration. Despite being metals that suffer from the Wiedemann-Franz law, the additional spin degrees of freedom allow for tuning of the thermoelectric properties due to the spin-valve enhancement factor (SVEF). We test this theory and find a mismatch of parameters that gives large TE performance and large SVEF. As a result, we show that the spin-valve setup is useful only for gapless HMF with initially poor TE performance. To obtain the largest TE performance, one still needs to open the band gap. |
| title | Optimal half-metal band structure for large thermoelectric performance |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2312.13140 |