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arXiv 1409.7629cond-mat.supr-con
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Cu $_x$ TiSe $_2$的点接触隧道光谱测量:无序增强库仑效应

Point-contact tunneling spectroscopy measurement of Cu$_x$TiSe$_2$: disorder-enhanced Coulomb effects

Katherine Luna, Phillip M. Wu, Justin S. Chen, Emilia Morosan, Malcolm R. Beasley

摘要:

我们进行了点接触光谱隧道测量Cu $_x$ TiSe $_2$散装与$x=0.02$和$0.06$在温度范围从$T=4-40$ K和观察到的抑制在零偏压附近的状态密度,我们归因于增强的库仑相互作用,由于无序。我们发现,与这种抑制相关的相关间隙与零温电阻率有关。我们用我们的结果来估计无无序转变温度,发现清洁极限$T_{c0}$接近实验观察到的$T_c$。

英文摘要:

We performed point-contact spectroscopy tunneling measurements on Cu$_x$TiSe$_2$ bulk with $x=0.02$ and $0.06$ at temperatures ranging from $T=4-40$ K and observe a suppression in the density of states around zero-bias that we attribute to enhanced Coulomb interactions due to disorder. We find that the correlation gap associated with this suppression is related to the zero-temperature resistivity. We use our results to estimate the disorder-free transition temperature and find that the clean limit $T_{c0}$ is close to the experimentally observed $T_c$.

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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