| 摘要: |
| Weyl半金属因其载流子满足外尔运动方程，表现出高迁移率、极大磁阻等新奇量子物性，从而在无耗散电子器件应用中具有广泛应用前景。在本文中，我们系统研究了块体TaP样品的磁电输运特性，获得了高达10^6 %极大的磁阻特性和显著的SdH振荡特性。结合TaP样品载流子随温度的变化行为，我们进一步揭示了块体TaP样品的极大磁阻的物理起源，在低温下，其主要来源于样品费米面附近近似补偿的空穴和电子，而在高温下则主要来源自块体TaP样品中增强的电子散射作用。我们的实验结果为理解Weyl半金属新奇量子输运特性和器件设计开发提供了实验参考。 |
| 关键词: TaP，极大磁阻，SdH振荡 |
| DOI： |
| 投稿时间：2024-03-01修订日期：2024-03-11 |
| 基金项目: |
|
| Study of Extremely Large Magnetoresistance and Quantum Oscillations in bulk TaP |
|
LI Minxin, LI Zhiqin, LIU Jia, LI Hui
|
| (Anhui University) |
| Abstract: |
| Weyl semimetals, known for their carriers satisfying the Weyl equation of motion, exhibit novel quantum properties such as high carrier mobility and extremely large magnetoresistance, making them promising candidates for dissipationless electronic devices. In this paper, we systematically investigated the magneto-transport properties of bulk TaP samples. We observed an exceptionally high magnetoresistance of up to 10^6 % and pronounced Shubnikov-de Haas (SdH) oscillations. By examining the temperature-dependent behavior of charge carriers in TaP samples, we further revealed the physical origin of the giant magnetoresistance. At low temperatures, it mainly stems from the nearly compensated holes and electrons near the Fermi surface of the sample, while at higher temperatures, it is mainly due to the enhanced electron scattering within the bulk TaP. Our experiments provide valuable insights for understanding the novel quantum transport properties of Weyl semimetals and offer a reference for the design and development of related devices. |
| Key words: TaP, Giant magnetoresistance, SdH oscillations |