@article{a677c91496314b69b3be87c28aca4ede,
title = "Measurement of coherent polarons in the strongly coupled antiferromagnetically ordered iron-chalcogenide Fe1.02Te using angle-resolved photoemission spectroscopy",
abstract = "The nature of metallicity and the level of electronic correlations in the antiferromagnetically ordered parent compounds are two important open issues for the iron-based superconductivity. We perform a temperature-dependent angle-resolved photoemission spectroscopy study of Fe1.02Te, the parent compound for iron chalcogenide superconductors. Deep in the antiferromagnetic state, the spectra exhibit a {"}peak-dip-hump{"} line shape associated with two clearly separate branches of dispersion, characteristics of polarons seen in manganites and lightly doped cuprates. As temperature increases towards the N{\'e}el temperature (TN), we observe a decreasing renormalization of the peak dispersion and a counterintuitive sharpening of the hump linewidth, suggestive of an intimate connection between the weakening electron-phonon (e-ph) coupling and antiferromagnetism. Our finding points to the highly correlated nature of the Fe1.02Te ground state featured by strong interactions among the charge, spin, and lattice and a good metallicity plausibly contributed by the coherent polaron motion.",
author = "Liu, {Z. K.} and He, {R. H.} and Lu, {D. H.} and M. Yi and Chen, {Y. L.} and M. Hashimoto and Moore, {R. G.} and Mo, {S. K.} and Nowadnick, {E. A.} and J. Hu and Liu, {T. J.} and Mao, {Z. Q.} and Devereaux, {T. P.} and Z. Hussain and Shen, {Z. X.}",
year = "2013",
month = jan,
day = "18",
doi = "10.1103/PhysRevLett.110.037003",
language = "English",
volume = "110",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "3",
}