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

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dc.creatorGweon, G. -H.
dc.creatorDenlinger, J. D.
dc.creatorAllen, J. W.
dc.creatorClaessen, R.
dc.creatorOlson, C. G.
dc.creatorHoechst, H.
dc.creatorMarcus, J.
dc.creatorSchlenker, C.
dc.creatorSchneemeyer, L. F.
dc.date2001-03-22
dc.date.accessioned2026-07-25T14:20:07Z
dc.descriptionQuasi-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.
dc.description23 pages, including 21 figures; to appear in a special issue of J. Elec. Spectr. Rel. Phenom
dc.identifierhttps://arxiv.org/abs/cond-mat/0103470
dc.identifierhttp://arxiv.org/abs/cond-mat/0103470
dc.identifierJ. Elec. Spectro. Rel. Phenom. 117, 481 (2001) (invited)
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/24842
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleARPES Line Shapes in FL and non-FL Quasi-Low-Dimensional Inorganic Metals
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