Anisotropic magnetoresistance of charge-density wave in o-TaS3
Anisotropic magnetoresistance of charge-density wave in o-TaS3
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o-TaS3 中电荷密度波的各向异性磁阻
DOI：
10.1103/physrevb.93.075423
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and S. Tanda
中科院分区：
文献类型：
--
作者：
K. Inagaki;T. Matsuura;M. Tsubota;S. Uji;T. Honma;and S. Tanda
我们报告了在高达 5.2 T 的磁场下 4.2 K 晶须中电荷密度波 (CDW) 的磁阻。在电流-电压特性的非线性区域中发现了各向异性负磁阻。通过绕轴旋转磁场来研究磁阻的角度依赖性，表现出双重对称性。当磁场平行于轴线时，磁阻幅度表现出最大，而当磁场平行于轴线时，磁阻幅度消失。观察到的各向异性可能来自沿轴相邻 CDW 的链间耦合差异。将各向异性与 CDW 的扫描隧道显微镜图像进行比较，使我们能够提供一张简单的图片来解释磁阻，即 CDW 在平面上延伸的量子干涉的离域性。
We report the magnetoresistance of a charge-density wave (CDW) inwhiskers at 4.2 K under a magnetic field up to 5.2 T. An anisotropic negative magnetoresistance was found in the nonlinear regime of current-voltage characteristics. The angle dependence of the magnetoresistance, studied by rotating the magnetic field upon theaxis, exhibited a twofold symmetry. The magnetoresistance amplitude exhibited maxima when the field was parallel to theaxis, whereas it vanished to theaxis. The observed anisotropy may come from a difference in interchain coupling of adjacent CDWs along theandaxes. Comparison of the anisotropy to the scanning tunneling microscope image of CDWs allows us to provide a simple picture to explain the magnetoresistance in terms of delocalization of quantum interference of CDWs extending over theplane.