Ruan Jiawei, Jian Shao-Kai, Zhang Dongqin, Yao Hong, Zhang Haijun, Zhang Shou-Cheng, Xing Dingyu
National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
Institute for Advanced Study, Tsinghua University, Beijing 100084, China.
Phys Rev Lett. 2016 Jun 3;116(22):226801. doi: 10.1103/PhysRevLett.116.226801. Epub 2016 Jun 2.
Weyl semimetals are new states of matter which feature novel Fermi arcs and exotic transport phenomena. Based on first-principles calculations, we report that the chalcopyrites CuTlSe_{2}, AgTlTe_{2}, AuTlTe_{2}, and ZnPbAs_{2} are ideal Weyl semimetals, having largely separated Weyl points (∼0.05 Å^{-1}) and uncovered Fermi arcs that are amenable to experimental detections. We also construct a minimal effective model to capture the low-energy physics of this class of Weyl semimetals. Our discovery is a major step toward a perfect playground of intriguing Weyl semimetals and potential applications for low-power and high-speed electronics.
外尔半金属是具有新型费米弧和奇异输运现象的新物质状态。基于第一性原理计算，我们报告了黄铜矿CuTlSe₂、AgTlTe₂、AuTlTe₂和ZnPbAs₂是理想的外尔半金属，具有很大程度上分离的外尔点（~0.05 Å⁻¹）和易于实验探测的未被覆盖的费米弧。我们还构建了一个最小有效模型来描述这类外尔半金属的低能物理。我们的发现是朝着构建有趣的外尔半金属的完美平台以及实现低功耗和高速电子学的潜在应用迈出的重要一步。
