arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.6795cond-mat.str-el
收藏

$o$ $_3$中电荷密度波的各向异性磁电阻

Anisotropic magnetoresistance of charge-density wave in $o$-TaS$_3$

Katsuhiko Inagaki, Toru Matsuura, Masakatsu Tsubota, Shinya Uji, Tatsuya Honma, Satoshi Tanda

摘要:

本文报道了在4.2 K和5.2 T的磁场下,$o$ $_3$晶须的电荷密度波(CDW)的磁电阻效应。在电流-电压特性的非线性区域发现了各向异性的负磁阻效应。通过旋转磁场对$c$轴的影响,研究了磁电阻的角度依赖性,结果显示出双重对称性。当磁场平行于$a$轴时,磁电阻幅值最大,而磁场平行于$b$轴时,磁电阻幅值消失.观察到的各向异性可能来自于相邻CDW沿$a$ -和$b$ -轴的链间偶联的差异。的各向异性的扫描隧道显微镜图像的CDW的比较,使我们能够提供一个简单的图片来解释的磁电阻在$b$ - $c$平面上延伸的CDW的量子干涉的离域。

英文摘要:

We report the magnetoresistance of a charge-density wave (CDW) in $o$-TaS$_3$ whiskers at 4.2 K under a magnetic field up to 5.2 T. An anisotropic negative magnetoresistance is found in the nonlinear regime of current-voltage characteristics. The angle dependence of the magnetoresistance, studied by rotating the magnetic field upon the $c$-axis, exhibited a two-fold symmetry. The magnetoresistance amplitude exhibits maxima when the field is parallel to the $a$-axis, whereas it vanishes to the $b$-axis. The observed anisotropy may come from difference in interchain coupling of adjacent CDWs along the $a$- and $b$-axes. 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 the $b$-$c$ plane.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑