Giant Nernst effect and field-enhanced transversal z(N)T in ZrTe5
Giant Nernst effect and field-enhanced transversal z(N)T in ZrTe5
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ZrTe5 中的巨能斯特效应和场增强横向 z(N)T
DOI：
10.1103/physrevb.103.045203
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发表时间：
2021
影响因子：
3.7
通讯作者：
Zhang Liyuan
中科院分区：
文献类型：
--
作者：
Wang Peipei;Cho Chang-woo;Tang Fangdong;Wang Peng;Zhang Wenjie;He Mingquan;Gu Genda;Wu Xiaosong;Shao Yonghong;Zhang Liyuan
热电材料可以从废热中回收电能，反之亦然，这在绿色能量收集和固态制冷机中具有重要意义。热电优值（）量化了能量转换效率，大的塞贝克或能斯特效应对于热电器件的发展至关重要。在这里，我们提出了一个显着大的能斯特热势拓扑半金属，这是由于强Berry曲率和双极输运。在K和B = 13 T时，最大面内（当B//B）接近1900，面外（当B//c）达到5000。作为的一个关键部分，线性增加的面内和磁阻关于B导致几乎线性增加的横向没有饱和下的高场。在B = 13 T和K时，最大值为0.12，明显优于相同条件下的纵向对应值。
Thermoelectric materials can recover electrical energy from waste heat and vice versa, which are of great significance in green energy harvesting and solid state refrigerators. The thermoelectric figure of merit () quantifies the energy conversion efficiency, and a large Seebeck or Nernst effect is crucial for the development of thermoelectric devices. Here we present a significantly large Nernst thermopower in topological semimetal, which is attributed to both strong Berry curvature and bipolar transport. The largest in-plane(whenB//b) approaches 1900atK andB= 13 T, and the out-of-plane(whenB//c) reaches 5000. As a critical part of, the linearly increased in-planeand resistivityin regard toBinduces an almost linear increasing transversalwithout saturation under high fields. The maximumof 0.12 was obtained atB= 13 T andK, which significantly surmounts its longitudinal counterpart under the same condition.