Large Nernst effect and possible temperature-induced Lifshitz transition in topological semimetal YbMnSb2

被引：4
|
作者：
Xu, Sheng [1 ]
Jiang, Chenxi [1 ,2 ]
Li, Shu-Xiang [1 ,2 ]
Mi, Jun-Jian [1 ,2 ]
Li, Zheng [1 ,2 ]
Xia, Tian-Long [3 ,4 ]
Tao, Qian [1 ,2 ]
Xu, Zhu-An [1 ,2 ,5 ]
机构：
[1] Zhejiang Univ, Sch Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, State Key Lab Silicon & Adv Semicond Mat, Hangzhou 310027, Peoples R China
[3] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
[4] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano De, Beijing 100872, Peoples R China
[5] Hefei Natl Lab, Hefei 230088, Peoples R China
来源：
PHYSICAL REVIEW B | 2023年 / 107卷 / 24期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
QUANTUM OSCILLATIONS; THERMOELECTRICS; STATE;
D O I：
10.1103/PhysRevB.107.245138
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Topological materials provide an interesting platform in the study of thermoelectric effect due to their novel electronic properties. Here we report the magneto-Seebeck (MS) effect, large Nernst effect, and a possible temperature-induced Lifshitz transition in topological semimetal YbMnSb2. It exhibits evident quantum oscillations in the MS effect from which six frequencies are extracted and a light effective mass of F4 is obtained. The large Nernst effect with the Nernst thermopower of about 40 & mu;VK-1 is discovered around 120 K and 14 T. Combining the analysis of the first-principles calculations and the Hall effect, we suggest that the large Nernst signal could mainly stem from the Dirac bands-induced high mobility and small Fermi energy (& epsilon;F). Besides, it could be further enhanced by the modified carrier properties resulting from the temperature-induced Lifshitz transition through the so-called ambipolar effect.
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收藏
页数：6
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