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

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26659We 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.3 figures; Erratum added to include missed referencesStrongly Correlated ElectronsMaterials ScienceHidden one-dimensional electronic structure and non-Fermi liquid angle resolved photoemission line shapes of $η$-Mo$_4$O$_{11}$text