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Hidden one-dimensional electronic structure and non-Fermi liquid angle resolved photoemission line shapes of $η$-Mo$_4$O$_{11}$

G. -H. Gweon·S. -K. Mo·J. W. Allen·C. R. Ast·H. Höchst·J. L. Sarrao·Z. Fisk
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Abstract

We report angle resolved photoemission (ARPES) spectra of $η$-Mo$_4$O$_{11}$, a layered metal that undergoes two charge density wave (CDW) transitions at 109 K and 30 K. We have directly observed the ``hidden one-dimensional (hidden-1d)'' Fermi surface and an anisotropic gap opening associated with the 109 K transition, in agreement with the band theoretical description of the CDW transition. In addition, as in other hidden-1d materials such as NaMo$_6$O$_{17}$, the ARPES line shapes show certain anomalies, which we discuss in terms of non-Fermi liquid physics and possible roles of disorder.

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G. -H. Gweon, S. -K. Mo, J. W. Allen, C. R. Ast, H. Höchst, J. L. Sarrao, Z. Fisk. 2005-07-25. Hidden one-dimensional electronic structure and non-Fermi liquid angle resolved photoemission line shapes of $η$-Mo$_4$O$_{11}$. https://doi.org/10.1103/physrevb.72.035126

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