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arXiv 1607.08677cond-mat.mes-hall
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强各向异性黑磷中的退相

Dephasing in strongly anisotropic black phosphorus

N. Hemsworth, V. Tayari, F. Telesio, S. Xiang, S. Roddaro, M. Caporali, A. Ienco, M. Serrano-Ruiz, M. Peruzzini, G. Gervais, T. Szkopek, S. Heun

摘要:

弱定位观察和确定在黑磷(bP)场效应晶体管65 nm厚。弱局域化行为被发现是在良好的协议与Hikami-Larkin-Nagaoka模型的领域高达1~T,从特征散射长度可以推断。发现退相长度$L_ϕ$随着空穴密度的增加而线性增加,在从霍尔效应推断的大约$10^{13} cm^{-2}$的空穴密度处达到55 nm的最大值。还研究了$L_ϕ$的温度依赖性,并且在1~K以上,发现在二维弹性散射的存在下,$L_ϕ$的温度依赖性比电子-电子散射的$L_ϕ\propto T^{-\frac{1}{2}}$依赖性特征弱。相反,观察到的幂律被发现接近以前在其他准一维系统,如金属纳米线和碳纳米管中观察到的。我们把我们的结果归因于bP的晶体结构,它具有一个“褶皱”的蜂窝晶格,形成了一个强各向异性的介质

英文摘要:

Weak localization was observed and determined in a black phosphorus (bP) field-effect transistor 65 nm thick. The weak localization behaviour was found to be in excellent agreement with the Hikami-Larkin-Nagaoka model for fields up to 1~T, from which characteristic scattering lengths could be inferred. The dephasing length $L_ϕ$ was found to increase linearly with increasing hole density attaining a maximum value of 55 nm at a hole density of approximately $10^{13} cm^{-2}$ inferred from the Hall effect. The temperature dependence of $L_ϕ$ was also investigated and above 1~K, it was found to decrease weaker than the $L_ϕ\propto T^{-\frac{1}{2}}$ dependence characteristic of electron-electron scattering in the presence of elastic scattering in two dimensions. Rather, the observed power law was found to be close to that observed previously in other quasi-one-dimensional systems such as metallic nanowires and carbon nanotubes. We attribute our result to the crystal structure of bP which host a `puckered' honeycomb lattice forming a strongly anisotropic medium

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。

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