@article{fae6379a32ac477bbb24734df92e476b,
title = "Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr3Ir2O7",
abstract = "We investigate the bilayer Ruddlesden-Popper iridate Sr3Ir 2O7 by temperature-dependent angle-resolved photoemission. At low temperatures, we find a fully gapped correlated insulator, characterized by a small charge gap and narrow bandwidths. The low-energy spectral features show a pronounced temperature-dependent broadening and non-quasiparticle-like Gaussian line shapes. Together, these spectral features provide experimental evidence for a polaronic ground state. We observe similar behavior for the single-layer cousin Sr2IrO4, indicating that strong electron-boson coupling dominates the low-energy excitations of this exotic family of 5d compounds.",
author = "King, {P. D.C.} and T. Takayama and A. Tamai and E. Rozbicki and Walker, {S. Mc Keown} and M. Shi and L. Patthey and Moore, {R. G.} and D. Lu and Shen, {K. M.} and H. Takagi and F. Baumberger",
year = "2013",
month = jun,
day = "24",
doi = "10.1103/PhysRevB.87.241106",
language = "English",
volume = "87",
journal = "Physical Review B - Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "American Physical Society",
number = "24",
}