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  • 李敏新,李志琴,刘佳,李惠.块体TaP 极大磁阻及量子振荡特性研究[J].低温物理学报,2024,(1):27-32.    [点击复制]
  • LI Minxin,LI Zhiqin,LIU Jia,LI Hui.Study of Extremely Large Magnetoresistance and Quantum Oscillations in Bulk TaP[J].LOW TEMPERATURE PHYSICAL LETTERS,2024,(1):27-32.   [点击复制]
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块体TaP 极大磁阻及量子振荡特性研究
李敏新, 李志琴, 刘佳, 李惠
0
(安徽大学物质科学与信息技术研究院量子材料与物理研究所, 合肥230601)
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106 %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:
基金项目:
Study of Extremely Large Magnetoresistance and Quantum Oscillations in Bulk TaP
LI Minxin, LI Zhiqin, LIU Jia, LI Hui
(Institute of Quantum Materials and Physics , Institute of Physical Science and Information Technology , Anhui University , Hefei 230601)
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 dissipation less 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 106 % 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

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