Fig. 1: Physics in one dimension and basic band structure of K0.3MoO3.
From: Band-selective Holstein polaron in Luttinger liquid material A0.3MoO3 (A = K, Rb)
a Luttinger liquid (LL) behavior in one dimension, where only low-energy particle-hole pairs with wave vector |q | ≈ 0 or |q | ≈ 2kF can be excited. b Charge-density-wave (CDW) and periodic lattice distortion, leading to a gap opening near the Fermi energy (EF). c An electron dressed by the local lattice distortion, forming the Holstein polaron and leading to band gaps and flat dispersions near multiples of the phonon energy (Ω0). d Crystal structure of A0.3MoO3 (A = K, Rb, Tl) showing one-dimensional chains of MoO6 octahedrons. Black lines indicate the unit cell. e Experimental Fermi surface (FS) by integrating ARPES intensity in an energy window of 20 meV near the Fermi energy (EF), with surface Brillouin zone appended. f, g Band dispersions along and \(\bar{X}-\bar{Z}\) showing the bonding (B) and anti-bonding (AB) bands measured along with cuts #1 and #2 as indicated by the orange lines in e. The dashed lines indicate the momentum position of high symmetry points. Data in e–g were collected at 80 K with a He lamp (hν = 21.2 eV).
