@article{5c2a3c4ed7a04192a48225de69933fd7,
title = "Anisotropic quasiparticle coherence in nematic BaFe2As2 studied with strain-dependent ARPES",
abstract = "The hallmark of nematic order in iron-based superconductors is a resistivity anisotropy but it is unclear to which extent quasiparticle dispersions, lifetimes, and coherence contribute. While the lifted degeneracy of the Fe dxz and dyz dispersions has been studied extensively, only little is known about the two other factors. Here, we combine in situ strain tuning with ARPES and study the nematic response of the spectral weight in BaFe2As2. The symmetry analysis of the ARPES spectra demonstrates that the dxz band gains quasiparticle spectral weight compared to the dyz band for negative antisymmetric strain Δϵyy suggesting the same response inside the nematic phase. Our results are compatible with a different coherence of the dxz and dyz orbital within a Hund's metal picture. We also discuss the influence of orbital mixing.",
author = "H. Pfau and Chen, {S. D.} and M. Hashimoto and N. Gauthier and Rotundu, {C. R.} and Palmstrom, {J. C.} and Fisher, {I. R.} and Mo, {S. K.} and Shen, {Z. X.} and D. Lu",
note = "Funding Information: We are grateful for valuable discussions with L. Benfatto, L. Fanfarillo, M. Ikeda, and M. Yi. H.P. acknowledges support from the German Science Foundation (DFG) under reference PF 947/1-1. J.C.P. was supported by a Gabilan Stanford Graduate Fellowship and a Stanford Lieberman Fellowship. While writing the paper J.C.P. was supported by a Reines Distinguished Postdoc Fellowship at the National High Magnetic Field Laboratory, Los Alamos National Laboratory. This work was supported by the Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-76SF00515. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Work at Lawrence Berkeley National Laboratory was funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-05-CH11231. Publisher Copyright: {\textcopyright} 2021 American Physical Society.",
year = "2021",
month = apr,
day = "26",
doi = "10.1103/PhysRevB.103.165136",
language = "English (US)",
volume = "103",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "16",
}