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arXiv cond-mat/0103470cond-mat.str-elcond-mat.mtrl-sci
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FL和非FL准低维无机金属中的ARPES行扫描

ARPES Line Shapes in FL and non-FL Quasi-Low-Dimensional Inorganic Metals

G. -H. Gweon, J. D. Denlinger, J. W. Allen, R. Claessen, C. G. Olson, H. Hoechst, J. Marcus, C. Schlenker, L. F. Schneemeyer

摘要:

准低维(准低维)无机材料不仅非常适合角分辨光电子能谱(ARPES),而且它们为研究新兴的非费米液体(non-FL)物理学范式的关键概念提供了丰富的基础。在这篇文章中,我们讨论了ARPES技术应用于三个准低D无机金属:一个典型的费米液体(FL)材料TiTe $_{2}$,一个著名的准一维电荷密度波(CDW)材料K $_{0.3}$ MoO $_{3}$和一个准一维非CDW材料Li $_{0.9}$ Mo $_{6}$ O $_{17}$。与TiTe $_2$,我们建立了多体理论解释的ARPES线的形状是可能的。我们还解决了如何从ARPES准确地确定{\bf k} $_F$值的基本问题。K $_{0.3}$ MoO $_{3}$和Li $_{0.9}$ Mo $_{6}$ O $_{17}$均表现出非FL线型的准一维电子结构。对于K $_{0.3}$ MoO $_{3}$观察到CDW能隙开口,而对于Li $_{0.9}$ Mo $_{6}$ O $_{17}$没有观察到能隙。然而,我们发现,标准的CDW理论,即使有很强的波动,是不足以描述的非FL线形状的K $_{0.3}$钼$_{3}$。我们认为,一个Luttinger液体(LL)模型是相关的青铜器,但也指出遇到的困难,在比较数据与理论。我们解释这种情况意味着一个更完整和现实的理论是必要的,以了解这些数据。

英文摘要:

Quasi-low-dimensional (quasi-low-D) inorganic materials are not only ideally suited for angle resolved photoemission spectroscopy (ARPES) but also they offer a rich ground for studying key concepts for the emerging paradigm of non-Fermi liquid (non-FL) physics. In this article, we discuss the ARPES technique applied to three quasi-low-D inorganic metals: a paradigm Fermi liquid (FL) material TiTe$_{2}$, a well-known quasi-1D charge density wave (CDW) material K$_{0.3}$MoO$_{3}$ and a quasi-1D non-CDW material Li$_{0.9}$Mo$_{6}$O$_{17}$. With TiTe$_2$, we establish that a many body theoretical interpretation of the ARPES line shape is possible. We also address the fundamental question of how to accurately determine the {\bf k}$_F$ value from ARPES. Both K$_{0.3}$MoO$_{3}$ and Li$_{0.9}$Mo$_{6}$O$_{17}$ show quasi-1D electronic structures with non-FL line shapes. A CDW gap opening is observed for K$_{0.3}$MoO$_{3}$, whereas no gap is observed for Li$_{0.9}$Mo$_{6}$O$_{17}$. We show, however, that the standard CDW theory, even with strong fluctuations, is not sufficient to describe the non-FL line shapes of K$_{0.3}$MoO$_{3}$. We argue that a Luttinger liquid (LL) model is relevant for both bronzes, but also point out difficulties encountered in comparing data with theory. We interpret this situation to mean that a more complete and realistic theory is necessary to understand these data.

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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