تقرير
Quantized Thermoelectric Hall Effect Induces Giant Power Factor in a Topological Semimetal
| العنوان: | Quantized Thermoelectric Hall Effect Induces Giant Power Factor in a Topological Semimetal |
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| المؤلفون: | Han, Fei, Andrejevic, Nina, Nguyen, Thanh, Kozii, Vladyslav, Nguyen, Quynh, Hogan, Tom, Ding, Zhiwei, Pablo-Pedro, Ricardo, Parjan, Shreya, Skinner, Brian, Alatas, Ahmet, Alp, Ercan, Chi, Songxue, Fernandez-Baca, Jaime, Huang, Shengxi, Fu, Liang, Li, Mingda |
| المصدر: | Nat Commun 11, 6167 (2020) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | Thermoelectrics are promising by directly generating electricity from waste heat. However, (sub-)room-temperature thermoelectrics have been a long-standing challenge due to vanishing electronic entropy at low temperatures. Topological materials offer a new avenue for energy harvesting applications. Recent theories predicted that topological semimetals at the quantum limit can lead to a large, non-saturating thermopower and a quantized thermoelectric Hall conductivity approaching a universal value. Here, we experimentally demonstrate the non-saturating thermopower and quantized thermoelectric Hall effect in the topological Weyl semimetal (WSM) tantalum phosphide (TaP). An ultrahigh longitudinal thermopower Sxx= 1.1x10^3 muV/K and giant power factor ~525 muW/cm/K^2 are observed at ~40K, which is largely attributed to the quantized thermoelectric Hall effect. Our work highlights the unique quantized thermoelectric Hall effect realized in a WSM toward low-temperature energy harvesting applications. Comment: 54 pages total, 5 main figures + 22 supplementary figures. To appear in Nature Communications (2020) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41467-020-19850-2 |
| URL الوصول: | http://arxiv.org/abs/1904.03179 |
| رقم الأكسشن: | edsarx.1904.03179 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/s41467-020-19850-2 |
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