Magnetic-tunnelling-induced Weyl node annihilation in TaP

doi:10.1038/nphys4183

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/117202

請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/117202

題名:	Magnetic-tunnelling-induced Weyl node annihilation in TaP
作者:	Zhang, Cheng-Long;Xu, Su-Yang;Wang, C. M.;Lin, Ziquan;Du, Z. Z.;Guo, Cheng;Lee, Chi-Cheng;Lu, Hong;Feng, Yiyang;Huang, Shin-Ming;Chang, Guoqing;Hsu, Chuang-Han;Liu, Haiwen;Lin, Hsin;Li, Liang;Zhang, Chi;Zhang, Jinglei;Xie, Xin-Cheng;Neupert, Titus;Hasan, M. Zahid;Lu, Hai-Zhou;Wang, Junfeng;Jia, Shuang
日期:	2017-07-10
上傳時間:	2019-10-03 12:11:00 (UTC+8)
出版者:	Springer Nature Limited
摘要:	Weyl nodes are topological objects in three-dimensional metals. Whereas the energy of the lowest Landau band of a conventional Fermi pocket increases with magnetic field due to the zero-point energy (1/2ℏω), the lowest Landau band of Weyl cones stays at zero energy unless a strong magnetic field couples Weyl fermions of opposite chirality. In the Weyl semimetal TaP, which possesses two types of Weyl nodes (four pairs of W1 and eight pairs of W2 nodes), we observed such a magnetic coupling between the electron pockets arising from the W1 Weyl fermions. As a result, their lowest Landau bands move above the chemical potential, leading to a sharp sign reversal in the Hall resistivity at a specific magnetic field corresponding to the separation in momentum space of the W1 Weyl nodes, . By contrast, annihilation is not observed for the hole pocket because the separation of the W2 Weyl nodes is much larger. These findings reveal the nontrivial topology of Weyl fermions in high-field transport measurements and demonstrate the observation of Weyl node annihilation, which is a unique topological phenomenon associated with Weyl fermions.
關聯:	Nature Physics 13, 979
DOI:	10.1038/nphys4183
顯示於類別:	[物理學系暨研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	108	檢視/開啟

在機構典藏中所有的資料項目都受到原著作權保護.

TAIR相關文章

資料載入中.....