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@ARTICLE{Ricci:454453,
author = {Ricci, Alessandro and Campi, G. and Joseph, B. and Poccia,
N. and Innocenti, D. and Gutt, C. and Tanaka, M. and Takeya,
H. and Takano, Y. and Mizokawa, T. and Sprung, Michael and
Saini, N. L.},
title = {{I}ntermittent dynamics of antiferromagnetic phase in
inhomogeneous iron-based chalcogenide superconductor},
journal = {Physical review / B},
volume = {101},
number = {2},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {PUBDB-2021-00527},
pages = {020508},
year = {2020},
abstract = {The coexistence of phases, characterized by different
electronic degrees of freedom, commonly occurs in layered
superconductors. Among them, alkaline intercalated
chalcogenides are model systems showing the microscale
coexistence of paramagnetic (PAR) and antiferromagnetic
(AFM) phases, however, the temporal behavior of different
phases is still unknown. Here, we report a visualization of
the atomic motion in the granular phase of KxFe2−ySe2
using x-ray photon correlation spectroscopy. Unlike the PAR
phase, the AFM texture reveals an intermittent dynamics with
avalanches as in martensites. When cooled down across the
superconducting transition temperature Tc, the AFM phase
goes through an anomalous slowing behavior, suggesting a
direct relationship between the atomic motions in the AFM
phase and the superconductivity. In addition to providing
compelling evidence of avalanchelike dynamics in a layered
superconductor, the results provide a basis for different
theoretical models to describe the quantum states in
inhomogeneous solids.},
cin = {DOOR ; HAS-User / FS-PET-S},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731 /
I:(DE-H253)FS-PET-S-20190712},
pnm = {6212 - Quantum Condensed Matter: Magnetism,
Superconductivity (POF3-621) / 6G3 - PETRA III (POF3-622)},
pid = {G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6G3},
experiment = {EXP:(DE-H253)P-P10-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000510386600001},
doi = {10.1103/PhysRevB.101.020508},
url = {https://bib-pubdb1.desy.de/record/454453},
}